diff --git a/reactos/include/reactos/debug.h b/reactos/include/reactos/debug.h
index 369a945e2c3..9dc594e3f9e 100644
--- a/reactos/include/reactos/debug.h
+++ b/reactos/include/reactos/debug.h
@@ -61,8 +61,9 @@
         #define CHECKPOINT do { DbgPrint("%s:%d\n",__FILE__,__LINE__); } while(0);
     
     #else
-    
-        #define DPRINT(...) do { if(0) { DbgPrint(__VA_ARGS__); } } while(0)
+		#if defined (__STDC__)
+			#define DPRINT(...) do { if(0) { DbgPrint(__VA_ARGS__); } } while(0)
+		#endif
         #define CHECKPOINT
     
     #endif
@@ -70,8 +71,10 @@
 #else
 
     /* On non-debug builds, we never show these */
+    #if defined (__STDC__)
     #define DPRINT1(...) do { if(0) { DbgPrint(__VA_ARGS__); } } while(0)
     #define DPRINT(...) do { if(0) { DbgPrint(__VA_ARGS__); } } while(0)
+    #endif
     #define CHECKPOINT1
     #define CHECKPOINT
 #endif