diff --git a/ChangeLog b/ChangeLog
index 9a29fcafa..5b140ca37 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2008-05-21  Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/NSRunLoop.m: Fix reference to uninitialised variable.
+
 2008-05-14  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Source/GSArray.m: Fix bug allowing nil to be placed in array.
diff --git a/Source/NSRunLoop.m b/Source/NSRunLoop.m
index 60c863703..e806c79f3 100644
--- a/Source/NSRunLoop.m
+++ b/Source/NSRunLoop.m
@@ -707,7 +707,7 @@ static inline BOOL timerInvalidated(NSTimer *t)
               NSMapInsert(current->_contextMap, context->mode, context);
               RELEASE(context);
             }
-          if (context->housekeeper != timer)
+          if (context->housekeeper != nil)
             {
               [context->housekeeper invalidate];
               DESTROY(context->housekeeper);