Index: /trunk/src/VBox/Main/include/VirtualBoxBase.h
===================================================================
--- /trunk/src/VBox/Main/include/VirtualBoxBase.h	(revision 55959)
+++ /trunk/src/VBox/Main/include/VirtualBoxBase.h	(revision 55960)
@@ -351,5 +351,5 @@
 #define CheckComArgNotNull(arg) \
     do { \
-        if (RT_LIKELY((arg) == NULL)) \
+        if (RT_LIKELY((arg) != NULL)) \
         { /* likely */ }\
         else \