diff --git a/lib/libc/net/res_config.h b/lib/libc/net/res_config.h
index 3afa3218b992..a1339d9652a1 100644
--- a/lib/libc/net/res_config.h
+++ b/lib/libc/net/res_config.h
@@ -1,4 +1,4 @@
-#define DEBUG		/* enable debugging code (needed for dig) */
+#define	DEBUG	1	/* enable debugging code (needed for dig) */
 #undef	ALLOW_T_UNSPEC	/* enable the "unspec" RR type for old athena */
 #define	RESOLVSORT	/* allow sorting of addresses in gethostbyname */
 #undef	RFC1535		/* comply with RFC1535 */