diff --git a/src/nbdebug.h b/src/nbdebug.h
index 3baeca4..65bb940 100644
--- a/src/nbdebug.h
+++ b/src/nbdebug.h
@@ -23,7 +23,7 @@
     }
 #endif
 
-#define nbdebug(a) nbdbg##a
+#define nbdebug(a) nbdbg a
 
 #define NB_TRACE		0x00000001
 #define NB_TRACE_VERBOSE	0x00000002