diff --git a/phpBB/styles/prosilver/template/ucp_pm_history.html b/phpBB/styles/prosilver/template/ucp_pm_history.html
index cadb44e914..5f2994f145 100644
--- a/phpBB/styles/prosilver/template/ucp_pm_history.html
+++ b/phpBB/styles/prosilver/template/ucp_pm_history.html
@@ -9,7 +9,7 @@
 	<div class="post <!-- IF history_row.S_ROW_COUNT is even -->bg1<!-- ELSE -->bg2<!-- ENDIF -->">
 		<div class="inner"><span class="corners-top"><span></span></span>
 
-		<div class="postbody" id="pr{history_row.U_MSG_ID}">
+		<div class="postbody" id="pr{history_row.MSG_ID}">
 			<!-- IF history_row.U_QUOTE -->
 			<ul class="profile-icons">
 				<li class="quote-icon"><a href="{history_row.U_QUOTE}" title="{L_QUOTE} {history_row.MESSAGE_AUTHOR}"><span>{L_QUOTE} {history_row.MESSAGE_AUTHOR}</span></a></li>
@@ -19,7 +19,7 @@
 			<h3><a href="{history_row.U_VIEW_MESSAGE}" <!-- IF history_row.S_CURRENT_MSG -->class="current"<!-- ENDIF -->>{history_row.SUBJECT}</a></h3>
 			<p class="author<!-- IF history_row.S_CURRENT_MSG --> current<!-- ENDIF -->">{history_row.MINI_POST_IMG} {L_SENT_AT}: <strong>{history_row.SENT_DATE}</strong><br />
 				{L_MESSAGE_BY_AUTHOR} {history_row.MESSAGE_AUTHOR_FULL}</p>
-			<div class="content<!-- IF history_row.S_CURRENT_MSG --> current<!-- ENDIF -->" id="message_{history_row.U_MSG_ID}">
+			<div class="content<!-- IF history_row.S_CURRENT_MSG --> current<!-- ENDIF -->" id="message_{history_row.MSG_ID}">
 				{history_row.MESSAGE}
 			</div>
 		</div>