diff --git a/Source/NSDebug.m b/Source/NSDebug.m
index 4d38b9a5d..0e4afbe74 100644
--- a/Source/NSDebug.m
+++ b/Source/NSDebug.m
@@ -912,7 +912,7 @@ + (void) initialize
   /* Create the map table outside the locked region to minimise time
    * locked and to avoid deadlock.
    */
-  answer = [NSMapTable mapTableWithStrongToStrongObjects];
+  answer = [NSMapTable strongToStrongObjectsMapTable];
 
   doLock();