@@ -349,11 +349,12 @@
 
 	instance = calloc(1, PRE_IVARS_ALIGN + instanceSize +
 	    extraAlignment + extraSize);
 
 	if OF_UNLIKELY (instance == nil) {
-		allocFailedException.isa = [OFAllocFailedException class];
+		object_setClass((id)&allocFailedException,
+		    [OFAllocFailedException class]);
 		@throw (id)&allocFailedException;
 	}
 
 	((struct PreIvars *)instance)->retainCount = 1;