diff --git a/sys/libkern/iconv.c b/sys/libkern/iconv.c
index 8eafa281d88e..1cd7147d6c0f 100644
--- a/sys/libkern/iconv.c
+++ b/sys/libkern/iconv.c
@@ -469,7 +469,9 @@ int
 iconv_lookupcp(char **cpp, const char *s)
 {
 	if (cpp == NULL) {
-		ICDEBUG("warning a NULL list passed\n");
+		ICDEBUG("warning a NULL list passed\n", ""); /* XXX ISO variadic								macros cannot
+								leave out the
+								variadic args */
 		return ENOENT;
 	}
 	for (; *cpp; cpp++)
diff --git a/sys/sys/iconv.h b/sys/sys/iconv.h
index 0f20129a80f4..affcc52e2eba 100644
--- a/sys/sys/iconv.h
+++ b/sys/sys/iconv.h
@@ -146,9 +146,9 @@ int iconv_converter_donestub(struct iconv_converter_class *dp);
 int iconv_converter_handler(module_t mod, int type, void *data);
 
 #ifdef ICONV_DEBUG
-#define ICDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
+#define ICDEBUG(format, ...) printf("%s: "format, __func__ , __VA_ARGS__)
 #else
-#define ICDEBUG(format, args...)
+#define ICDEBUG(format, ...)
 #endif
 
 #endif /* !_KERNEL */