diff --git a/lib/isc/include/isc/mem.h b/lib/isc/include/isc/mem.h
index 6d9f606383..70d1c81dc0 100644
--- a/lib/isc/include/isc/mem.h
+++ b/lib/isc/include/isc/mem.h
@@ -15,7 +15,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: mem.h,v 1.86 2009/09/04 18:51:37 jinmei Exp $ */
+/* $Id: mem.h,v 1.87 2010/03/04 05:45:51 marka Exp $ */
 
 #ifndef ISC_MEM_H
 #define ISC_MEM_H 1
@@ -121,7 +121,7 @@ LIBISC_EXTERNAL_DATA extern unsigned int isc_mem_debugging;
 
 #if ISC_MEM_TRACKLINES
 #define _ISC_MEM_FILELINE	, __FILE__, __LINE__
-#define _ISC_MEM_FLARG		, const char *, int
+#define _ISC_MEM_FLARG		, const char *, unsigned int
 #else
 #define _ISC_MEM_FILELINE
 #define _ISC_MEM_FLARG