diff --git a/phpBB/phpbb/textformatter/s9e/factory.php b/phpBB/phpbb/textformatter/s9e/factory.php
index a310c67359..55149b8e63 100644
--- a/phpBB/phpbb/textformatter/s9e/factory.php
+++ b/phpBB/phpbb/textformatter/s9e/factory.php
@@ -348,10 +348,10 @@ class factory implements \phpbb\textformatter\cache_interface
 		$configurator->registeredVars['max_img_width'] = 0;
 
 		// Load the Emoji plugin and modify its tag's template to obey viewsmilies
-		$configurator->Emoji->setImageSize(18);
+		$configurator->Emoji->omitImageSize();
 		$configurator->Emoji->useSVG();
 		$tag = $configurator->Emoji->getTag();
-		$tag->template = '<xsl:choose><xsl:when test="$S_VIEWSMILIES">' . str_replace('class="emoji"', 'class="smilies"', $tag->template) . '</xsl:when><xsl:otherwise><xsl:value-of select="."/></xsl:otherwise></xsl:choose>';
+		$tag->template = '<xsl:choose><xsl:when test="$S_VIEWSMILIES">' . str_replace('class="emoji"', 'class="emoji smilies"', $tag->template) . '</xsl:when><xsl:otherwise><xsl:value-of select="."/></xsl:otherwise></xsl:choose>';
 
 		/**
 		* Modify the s9e\TextFormatter configurator after the default settings are set
diff --git a/phpBB/styles/prosilver/theme/common.css b/phpBB/styles/prosilver/theme/common.css
index 9da5cfe3be..8505ac13f9 100644
--- a/phpBB/styles/prosilver/theme/common.css
+++ b/phpBB/styles/prosilver/theme/common.css
@@ -1047,6 +1047,13 @@ ul.linklist:after,
 	display: block;
 }
 
+.emoji {
+	min-height: 18px;
+	min-width: 18px;
+	height: 1em;
+	width: 1em;
+}
+
 .smilies {
 	vertical-align: text-bottom;
 }
diff --git a/tests/text_formatter/s9e/default_formatting_test.php b/tests/text_formatter/s9e/default_formatting_test.php
index e25c3246b5..a0c57214e4 100644
--- a/tests/text_formatter/s9e/default_formatting_test.php
+++ b/tests/text_formatter/s9e/default_formatting_test.php
@@ -298,7 +298,7 @@ class phpbb_textformatter_s9e_default_formatting_test extends phpbb_test_case
 			),
 			array(
 				"Emoji: \xF0\x9F\x98\x80",
-				'Emoji: <img alt="' . "\xF0\x9F\x98\x80" . '" class="smilies" draggable="false" width="18" height="18" src="//cdn.jsdelivr.net/emojione/assets/svg/1f600.svg">'
+				'Emoji: <img alt="' . "\xF0\x9F\x98\x80" . '" class="emoji smilies" draggable="false" src="//cdn.jsdelivr.net/emojione/assets/svg/1f600.svg">'
 			),
 			array(
 				"Emoji: \xF0\x9F\x98\x80",