diff --git a/net/dns_resolver/internal.h b/net/dns_resolver/internal.h
index 189ca9e..17c7886 100644
--- a/net/dns_resolver/internal.h
+++ b/net/dns_resolver/internal.h
@@ -31,7 +31,7 @@
 /*
  * debug tracing
  */
-extern unsigned dns_resolver_debug;
+extern unsigned int dns_resolver_debug;
 
 #define	kdebug(FMT, ...)				\
 do {							\