diff --git a/libc/netbsd/resolv/res_debug.h b/libc/netbsd/resolv/res_debug.h
new file mode 100644
index 0000000..4341c5a
--- /dev/null
+++ b/libc/netbsd/resolv/res_debug.h
@@ -0,0 +1,36 @@
+/*	$NetBSD: res_debug.h,v 1.1.1.1 2004/05/20 17:18:55 christos Exp $	*/
+
+/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 1999 by Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _RES_DEBUG_H_
+#define _RES_DEBUG_H_
+
+#ifndef DEBUG
+#   define Dprint(cond, args) /*empty*/
+#   define DprintQ(cond, args, query, size) /*empty*/
+#   define Aerror(statp, file, string, error, address) /*empty*/
+#   define Perror(statp, file, string, error) /*empty*/
+#else
+#   define Dprint(cond, args) if (cond) {fprintf args;} else {}
+#   define DprintQ(cond, args, query, size) if (cond) {\
+			fprintf args;\
+			res_pquery(statp, query, size, stdout);\
+		} else {}
+#endif
+
+#endif /* _RES_DEBUG_H_ */