diff --git a/AbuseFilter.class.php b/AbuseFilter.class.php
index c9a77ddb8..825e8ea00 100644
--- a/AbuseFilter.class.php
+++ b/AbuseFilter.class.php
@@ -1020,7 +1020,7 @@ class AbuseFilter {
 	 *
 	 * @param $stored_dump
 	 *
-	 * @return object|AbuseFilterVariableHolder
+	 * @return object|AbuseFilterVariableHolder|bool
 	 */
 	public static function loadVarDump( $stored_dump ) {
 		wfProfileIn( __METHOD__ );
diff --git a/special/SpecialAbuseLog.php b/special/SpecialAbuseLog.php
index 1238762ad..936ad2dda 100644
--- a/special/SpecialAbuseLog.php
+++ b/special/SpecialAbuseLog.php
@@ -281,7 +281,7 @@ class SpecialAbuseLog extends SpecialPage {
 		$vars = AbuseFilter::loadVarDump( $row->afl_var_dump );
 
 		// Diff, if available
-		if ( $vars->getVar( 'action' )->toString() == 'edit' ) {
+		if ( $vars && $vars->getVar( 'action' )->toString() == 'edit' ) {
 			$old_wikitext = $vars->getVar( 'old_wikitext' )->toString();
 			$new_wikitext = $vars->getVar( 'new_wikitext' )->toString();