diff --git a/phpBB/adm/style/acp_icons.html b/phpBB/adm/style/acp_icons.html
index f18dad0ef6..e723129e37 100644
--- a/phpBB/adm/style/acp_icons.html
+++ b/phpBB/adm/style/acp_icons.html
@@ -89,6 +89,9 @@
 	<!-- ENDIF -->
 		<td>{L_WIDTH}</td>
 		<td>{L_HEIGHT}</td>
+	<!-- IF not S_SMILIES -->
+		<td>{L_ALT_TEXT}</td>
+	<!-- ENDIF -->
 		<td>{L_DISPLAY_ON_POSTING}</td>
 	<!-- IF ID or S_ADD -->
 		<td>{L_ORDER}</td>
@@ -102,7 +105,7 @@
 	<!-- BEGIN items -->
 		<tr>
 
-		<td style="text-align: center;"><img src="{items.IMG_SRC}" alt="" title="" /><input type="hidden" name="image[{items.IMG}]" value="1" /></td>
+		<td style="text-align: center;"><img src="{items.IMG_SRC}" alt="{items.TEXT_ALT}" title="{items.TEXT_ALT}" /><input type="hidden" name="image[{items.IMG}]" value="1" /></td>
 		<td style="vertical-align: top;">[{items.IMG}]</td>
 		<!-- IF S_SMILIES -->
 			<td><input class="text post" type="text" name="code[{items.IMG}]" value="{items.CODE}" size="10" maxlength="50" /></td>
@@ -110,6 +113,9 @@
 		<!-- ENDIF -->
 		<td><input class="text post" type="number" size="3" name="width[{items.IMG}]" value="{items.WIDTH}" /></td>
 		<td><input class="text post" type="number" size="3" name="height[{items.IMG}]" value="{items.HEIGHT}" /></td>
+		<!-- IF not S_SMILIES -->
+			<td><input class="text post" type="text" name="alt[{items.IMG}]" value="{items.ALT}" size="10" maxlength="50" /></td>
+		<!-- ENDIF -->
 		<td>
 			<input type="checkbox" class="radio" name="display_on_posting[{items.IMG}]"{items.POSTING_CHECKED} onclick="toggle_select('{items.A_IMG}', this.checked, '{items.S_ROW_COUNT}');"/>
 			<!-- IF items.S_ID -->
diff --git a/phpBB/includes/acp/acp_icons.php b/phpBB/includes/acp/acp_icons.php
index 5d1756de45..57a36bb9f3 100644
--- a/phpBB/includes/acp/acp_icons.php
+++ b/phpBB/includes/acp/acp_icons.php
@@ -248,7 +248,7 @@ class acp_icons
 					$data = $_images;
 				}
 
-				$colspan = (($mode == 'smilies') ? 7 : 5);
+				$colspan = (($mode == 'smilies') ? 7 : 6);
 				$colspan += ($icon_id) ? 1 : 0;
 				$colspan += ($action == 'add') ? 2 : 0;
 
@@ -292,6 +292,8 @@ class acp_icons
 						'ID'				=> (isset($img_row[$fields . '_id'])) ? $img_row[$fields . '_id'] : 0,
 						'WIDTH'				=> (!empty($img_row[$fields .'_width'])) ? $img_row[$fields .'_width'] : $img_row['width'],
 						'HEIGHT'			=> (!empty($img_row[$fields .'_height'])) ? $img_row[$fields .'_height'] : $img_row['height'],
+						'TEXT_ALT'		    => ($mode == 'icons' && !empty($img_row['icons_alt'])) ? $img_row['icons_alt'] : $img,
+						'ALT'			    => ($mode == 'icons' && !empty($img_row['icons_alt'])) ? $img_row['icons_alt'] : '',
 						'POSTING_CHECKED'	=> (!empty($img_row['display_on_posting']) || $action == 'add') ? ' checked="checked"' : '',
 					));
 				}
@@ -336,6 +338,7 @@ class acp_icons
 				$image_add		= (isset($_POST['add_img'])) ? $request->variable('add_img', array('' => 0)) : array();
 				$image_emotion	= $request->variable('emotion', array('' => ''), true);
 				$image_code		= $request->variable('code', array('' => ''), true);
+				$image_alt		= ($request->is_set_post('alt')) ? $request->variable('alt', array('' => ''), true) : array();
 				$image_display_on_posting = (isset($_POST['display_on_posting'])) ? $request->variable('display_on_posting', array('' => 0)) : array();
 
 				// Ok, add the relevant bits if we are adding new codes to existing emoticons...
@@ -438,6 +441,13 @@ class acp_icons
 							);
 						}
 
+						if ($mode == 'icons')
+						{
+							$img_sql = array_merge($img_sql, array(
+								'icons_alt'	=> $image_alt[$image])
+							);
+						}
+
 						// Image_order holds the 'new' order value
 						if (!empty($image_order[$image]))
 						{
@@ -921,7 +931,7 @@ class acp_icons
 
 		while ($row = $db->sql_fetchrow($result))
 		{
-			$alt_text = ($mode == 'smilies') ? $row['code'] : '';
+			$alt_text = ($mode == 'smilies') ? $row['code'] : (($mode == 'icons' && !empty($row['icons_alt'])) ? $row['icons_alt'] : $row['icons_url']);
 
 			$template->assign_block_vars('items', array(
 				'S_SPACER'		=> (!$spacer && !$row['display_on_posting']) ? true : false,
diff --git a/phpBB/includes/functions_posting.php b/phpBB/includes/functions_posting.php
index 8b17dba534..19756d97b4 100644
--- a/phpBB/includes/functions_posting.php
+++ b/phpBB/includes/functions_posting.php
@@ -311,10 +311,10 @@ function posting_gen_topic_icons($mode, $icon_id)
 			{
 				$template->assign_block_vars('topic_icon', array(
 					'ICON_ID'		=> $id,
-					'ICON_NAME'		=> $data['img'],
 					'ICON_IMG'		=> $root_path . $config['icons_path'] . '/' . $data['img'],
 					'ICON_WIDTH'	=> $data['width'],
 					'ICON_HEIGHT'	=> $data['height'],
+					'ICON_ALT'		=> $data['alt'],
 
 					'S_CHECKED'			=> ($id == $icon_id) ? true : false,
 					'S_ICON_CHECKED'	=> ($id == $icon_id) ? ' checked="checked"' : '')
diff --git a/phpBB/language/en/common.php b/phpBB/language/en/common.php
index 0390dbb2ac..1f359cc232 100644
--- a/phpBB/language/en/common.php
+++ b/phpBB/language/en/common.php
@@ -83,6 +83,7 @@ $lang = array_merge($lang, array(
 	'ALL_POSTS'						=> 'All posts',
 	'ALL_TIMES'						=> 'All times are <span title="%2$s">%1$s</span>',
 	'ALL_TOPICS'					=> 'All Topics',
+	'ALT_TEXT'						=> 'Alternative text',
 	'AND'							=> 'And',
 	'ARE_WATCHING_FORUM'			=> 'You have subscribed to be notified of new posts in this forum.',
 	'ARE_WATCHING_TOPIC'			=> 'You have subscribed to be notified of new posts in this topic.',
diff --git a/phpBB/phpbb/cache/service.php b/phpBB/phpbb/cache/service.php
index 56727c2ad5..a022c00bc6 100644
--- a/phpBB/phpbb/cache/service.php
+++ b/phpBB/phpbb/cache/service.php
@@ -141,6 +141,7 @@ class service
 				$icons[$row['icons_id']]['img'] = $row['icons_url'];
 				$icons[$row['icons_id']]['width'] = (int) $row['icons_width'];
 				$icons[$row['icons_id']]['height'] = (int) $row['icons_height'];
+				$icons[$row['icons_id']]['alt'] = ($row['icons_alt']) ? $row['icons_alt'] : '';
 				$icons[$row['icons_id']]['display'] = (bool) $row['display_on_posting'];
 			}
 			$this->db->sql_freeresult($result);
diff --git a/phpBB/phpbb/db/migration/data/v320/icons_alt.php b/phpBB/phpbb/db/migration/data/v320/icons_alt.php
new file mode 100644
index 0000000000..7071ae78db
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/icons_alt.php
@@ -0,0 +1,44 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class icons_alt extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v310\dev');
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_columns'        => array(
+				$this->table_prefix . 'icons'        => array(
+					'icons_alt'    => array('VCHAR', '', 'after' => 'icons_height'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_columns'        => array(
+				$this->table_prefix . 'icons'        => array(
+					'icons_alt',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/styles/prosilver/template/posting_editor.html b/phpBB/styles/prosilver/template/posting_editor.html
index 60d7b6c428..9376ae8be7 100644
--- a/phpBB/styles/prosilver/template/posting_editor.html
+++ b/phpBB/styles/prosilver/template/posting_editor.html
@@ -6,7 +6,7 @@
 		<dt><label for="icon">{L_ICON}{L_COLON}</label></dt>
 		<dd>
 			<label for="icon"><input type="radio" name="icon" id="icon" value="0" checked="checked" tabindex="1" /> <!-- IF S_SHOW_TOPIC_ICONS -->{L_NO_TOPIC_ICON}<!-- ELSE -->{L_NO_PM_ICON}<!-- ENDIF --></label>
-			<!-- BEGIN topic_icon --><label for="icon-{topic_icon.ICON_ID}"><input type="radio" name="icon" id="icon-{topic_icon.ICON_ID}" value="{topic_icon.ICON_ID}" {topic_icon.S_ICON_CHECKED} tabindex="1" /><img src="{topic_icon.ICON_IMG}" width="{topic_icon.ICON_WIDTH}" height="{topic_icon.ICON_HEIGHT}" alt="{topic_icon.ICON_NAME}" title="" /></label> <!-- END topic_icon -->
+			<!-- BEGIN topic_icon --><label for="icon-{topic_icon.ICON_ID}"><input type="radio" name="icon" id="icon-{topic_icon.ICON_ID}" value="{topic_icon.ICON_ID}" {topic_icon.S_ICON_CHECKED} tabindex="1" /><img src="{topic_icon.ICON_IMG}" width="{topic_icon.ICON_WIDTH}" height="{topic_icon.ICON_HEIGHT}" alt="{topic_icon.ICON_ALT}" title="{topic_icon.ICON_ALT}" /></label> <!-- END topic_icon -->
 		</dd>
 	</dl>
 	<!-- ENDIF -->
diff --git a/phpBB/styles/prosilver/template/viewtopic_body.html b/phpBB/styles/prosilver/template/viewtopic_body.html
index cebf2c1ff6..5642c0a5cb 100644
--- a/phpBB/styles/prosilver/template/viewtopic_body.html
+++ b/phpBB/styles/prosilver/template/viewtopic_body.html
@@ -222,7 +222,7 @@
 			<!-- ENDIF -->
 			<div id="post_content{postrow.POST_ID}"<!-- IF postrow.S_POST_HIDDEN --> style="display: none;"<!-- ENDIF -->>
 
-			<h3 <!-- IF postrow.S_FIRST_ROW -->class="first"<!-- ENDIF -->><!-- IF postrow.POST_ICON_IMG --><img src="{T_ICONS_PATH}{postrow.POST_ICON_IMG}" width="{postrow.POST_ICON_IMG_WIDTH}" height="{postrow.POST_ICON_IMG_HEIGHT}" alt="" /> <!-- ENDIF --><a href="#p{postrow.POST_ID}">{postrow.POST_SUBJECT}</a></h3>
+			<h3 <!-- IF postrow.S_FIRST_ROW -->class="first"<!-- ENDIF -->><!-- IF postrow.POST_ICON_IMG --><img src="{T_ICONS_PATH}{postrow.POST_ICON_IMG}" width="{postrow.POST_ICON_IMG_WIDTH}" height="{postrow.POST_ICON_IMG_HEIGHT}" alt="{postrow.POST_ICON_IMG_ALT}" title="{postrow.POST_ICON_IMG_ALT}" /> <!-- ENDIF --><a href="#p{postrow.POST_ID}">{postrow.POST_SUBJECT}</a></h3>
 
 		<!-- DEFINE $SHOW_POST_BUTTONS = (postrow.U_EDIT or postrow.U_DELETE or postrow.U_REPORT or postrow.U_WARN or postrow.U_INFO or postrow.U_QUOTE) -->
 		<!-- EVENT viewtopic_body_post_buttons_list_before -->
diff --git a/phpBB/viewtopic.php b/phpBB/viewtopic.php
index 27ed898d99..8be23def00 100644
--- a/phpBB/viewtopic.php
+++ b/phpBB/viewtopic.php
@@ -1891,6 +1891,7 @@ for ($i = 0, $end = sizeof($post_list); $i < $end; ++$i)
 		'POST_ICON_IMG'			=> ($topic_data['enable_icons'] && !empty($row['icon_id'])) ? $icons[$row['icon_id']]['img'] : '',
 		'POST_ICON_IMG_WIDTH'	=> ($topic_data['enable_icons'] && !empty($row['icon_id'])) ? $icons[$row['icon_id']]['width'] : '',
 		'POST_ICON_IMG_HEIGHT'	=> ($topic_data['enable_icons'] && !empty($row['icon_id'])) ? $icons[$row['icon_id']]['height'] : '',
+		'POST_ICON_IMG_ALT' 	=> ($topic_data['enable_icons'] && !empty($row['icon_id'])) ? $icons[$row['icon_id']]['alt'] : '',
 		'ONLINE_IMG'			=> ($poster_id == ANONYMOUS || !$config['load_onlinetrack']) ? '' : (($user_cache[$poster_id]['online']) ? $user->img('icon_user_online', 'ONLINE') : $user->img('icon_user_offline', 'OFFLINE')),
 		'S_ONLINE'				=> ($poster_id == ANONYMOUS || !$config['load_onlinetrack']) ? false : (($user_cache[$poster_id]['online']) ? true : false),