diff --git a/reactos/include/ntdll/ntdll.h b/reactos/include/ntdll/ntdll.h
index f87c2c019a1..8c2aaeeb5cd 100644
--- a/reactos/include/ntdll/ntdll.h
+++ b/reactos/include/ntdll/ntdll.h
@@ -7,8 +7,10 @@
 
 #ifndef NASSERT
 #define assert(x) if (!(x)) {DbgPrint("Assertion "#x" failed at %s:%d\n", __FILE__,__LINE__); for(;;);}
+#define ASSERT(x) if (!(x)) {DbgPrint("Assertion "#x" failed at %s:%d\n", __FILE__,__LINE__); for(;;);}
 #else
 #define assert(x)
+#define ASSERT(x)
 #endif
 
 #endif