diff --git a/phpBB/groupcp.php b/phpBB/groupcp.php
index 998cb1cd5a..0789834749 100644
--- a/phpBB/groupcp.php
+++ b/phpBB/groupcp.php
@@ -1198,6 +1198,8 @@ else
 		$template->assign_block_vars("groups_remaining", array() );
 	}
 
+	$s_hidden_fields = '<input type="hidden" name="sid" value="' . $userdata['session_id'] . '" />';
+
 	$template->assign_vars(array(
 		"L_GROUP_MEMBERSHIP_DETAILS" => $lang['Group_member_details'],
 		"L_JOIN_A_GROUP" => $lang['Group_member_join'],
@@ -1209,6 +1211,7 @@ else
 		"L_VIEW_INFORMATION" => $lang['View_Information'], 
 
 		"S_USERGROUP_ACTION" => append_sid("groupcp.$phpEx"), 
+		"S_HIDDEN_FIELDS" => $s_hidden_fields, 
 
 		"GROUP_LIST_SELECT" => $s_group_list,
 		"GROUP_PENDING_SELECT" => $s_pending_groups,
diff --git a/phpBB/templates/subSilver/groupcp_user_body.tpl b/phpBB/templates/subSilver/groupcp_user_body.tpl
index b2076f4361..923deca284 100644
--- a/phpBB/templates/subSilver/groupcp_user_body.tpl
+++ b/phpBB/templates/subSilver/groupcp_user_body.tpl
@@ -18,7 +18,7 @@
 		<tr><form method="get" action="{S_USERGROUP_ACTION}">
 			<td width="40%"><span class="gensmall">{GROUP_MEMBER_SELECT}</span></td>
 			<td align="center" width="30%"> 
-			  <input type="submit" value="{L_VIEW_INFORMATION}" class="liteoption" />
+			  <input type="submit" value="{L_VIEW_INFORMATION}" class="liteoption" />{S_HIDDEN_FIELDS}
 			</td>
 		</form></tr>
 	  </table>
@@ -33,7 +33,7 @@
 		<tr><form method="get" action="{S_USERGROUP_ACTION}">
 			<td width="40%"><span class="gensmall">{GROUP_PENDING_SELECT}</span></td>
 			<td align="center" width="30%"> 
-			  <input type="submit" value="{L_VIEW_INFORMATION}" class="liteoption" />
+			  <input type="submit" value="{L_VIEW_INFORMATION}" class="liteoption" />{S_HIDDEN_FIELDS}
 			</td>
 		</form></tr>
 	  </table>
@@ -52,7 +52,7 @@
 		<tr><form method="get" action="{S_USERGROUP_ACTION}">
 			<td width="40%"><span class="gensmall">{GROUP_LIST_SELECT}</span></td>
 			<td align="center" width="30%"> 
-			  <input type="submit" value="{L_VIEW_INFORMATION}" class="liteoption" />
+			  <input type="submit" value="{L_VIEW_INFORMATION}" class="liteoption" />{S_HIDDEN_FIELDS}
 			</td>
 		</form></tr>
 	  </table>