diff --git a/phpBB/docs/events.md b/phpBB/docs/events.md
index 229ec7fe4e..5eba051ba8 100644
--- a/phpBB/docs/events.md
+++ b/phpBB/docs/events.md
@@ -1298,6 +1298,14 @@ quickreply_editor_message_before
 * Since: 3.1.0-a4
 * Purpose: Add content before the quick reply textbox
 
+quickreply_editor_subject_before
+===
+* Locations:
+    + styles/prosilver/template/quickreply_editor.html
+    + styles/subsilver2/template/quickreply_editor.html
+* Since: 3.1.7-RC1
+* Purpose: Add content before the quick reply subject textbox
+
 search_body_form_before
 ===
 * Locations:
diff --git a/phpBB/styles/prosilver/template/quickreply_editor.html b/phpBB/styles/prosilver/template/quickreply_editor.html
index 6a8846626e..ca8ccc0a6b 100644
--- a/phpBB/styles/prosilver/template/quickreply_editor.html
+++ b/phpBB/styles/prosilver/template/quickreply_editor.html
@@ -4,6 +4,7 @@
 		<div class="inner">
 				<h2 class="quickreply-title">{L_QUICKREPLY}</h2>
 				<fieldset class="fields1">
+				<!-- EVENT quickreply_editor_subject_before -->
 					<dl style="clear: left;">
 						<dt><label for="subject">{L_SUBJECT}{L_COLON}</label></dt>
 						<dd><input type="text" name="subject" id="subject" size="45" maxlength="124" tabindex="2" value="{SUBJECT}" class="inputbox autowidth" /></dd>
diff --git a/phpBB/styles/subsilver2/template/quickreply_editor.html b/phpBB/styles/subsilver2/template/quickreply_editor.html
index 5afc723f48..a7614e841f 100644
--- a/phpBB/styles/subsilver2/template/quickreply_editor.html
+++ b/phpBB/styles/subsilver2/template/quickreply_editor.html
@@ -4,6 +4,7 @@
 		<tr>
 			<th align="center" colspan="2">{L_QUICKREPLY}</th>
 		</tr>
+		<!-- EVENT quickreply_editor_subject_before -->
 		<tr>
 			<td class="row1" width="22%"><b class="genmed">{L_SUBJECT}{L_COLON}</b></td>
 			<td  class="row2" width="78%"><input class="post" style="width:450px" type="text" name="subject" size="45" maxlength="124" tabindex="2" value="{SUBJECT}" /></td>