Index: /trunk/src/VBox/Runtime/r3/alloc.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r3/alloc.cpp	(revision 46545)
+++ /trunk/src/VBox/Runtime/r3/alloc.cpp	(revision 46546)
@@ -40,4 +40,8 @@
 #endif
 
+#if defined(RTMEMALLOC_USE_TRACKER) && defined(RTMEM_NO_WRAP_TO_EF_APIS)
+# error "Cannot define both RTMEMALLOC_USE_TRACKER and RTMEM_NO_WRAP_TO_EF_APIS!"
+#endif
+
 
 /*******************************************************************************