@@ -389,10 +389,13 @@
 
 - freeMemory: (void*)ptr;
 {
 	void **iter, *last, **memchunks;
 	size_t i, memchunks_size;
+
+	if (ptr == NULL)
+		return self;
 
 	iter = PRE_IVAR->memchunks + PRE_IVAR->memchunks_size;
 	i = PRE_IVAR->memchunks_size;
 
 	while (iter-- > PRE_IVAR->memchunks) {