diff --git a/phpBB/includes/acp/acp_groups.php b/phpBB/includes/acp/acp_groups.php
index b604e20094..9145a20400 100644
--- a/phpBB/includes/acp/acp_groups.php
+++ b/phpBB/includes/acp/acp_groups.php
@@ -439,7 +439,7 @@ class acp_groups
 
 						foreach ($test_variables as $test => $type)
 						{
-							if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test] || in_array($test, $set_attributes)))
+							if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test] || isset($group_attributes['group_avatar']) && strpos($test, 'avatar') === 0 || in_array($test, $set_attributes)))
 							{
 								settype($submit_ary[$test], $type);
 								$group_attributes['group_' . $test] = $group_row['group_' . $test] = $submit_ary[$test];
diff --git a/phpBB/includes/ucp/ucp_groups.php b/phpBB/includes/ucp/ucp_groups.php
index d92aea91f8..b9a06bc3b4 100644
--- a/phpBB/includes/ucp/ucp_groups.php
+++ b/phpBB/includes/ucp/ucp_groups.php
@@ -618,7 +618,7 @@ class ucp_groups
 
 								foreach ($test_variables as $test => $type)
 								{
-									if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test]))
+									if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test] || isset($group_attributes['group_avatar']) && strpos($test, 'avatar') === 0))
 									{
 										settype($submit_ary[$test], $type);
 										$group_attributes['group_' . $test] = $group_row['group_' . $test] = $submit_ary[$test];