diff --git a/authd/reslib.c b/authd/reslib.c
index c5f136393..52589ad1c 100644
--- a/authd/reslib.c
+++ b/authd/reslib.c
@@ -133,6 +133,8 @@ static const char digitvalue[256] = {
 
 #ifndef _WIN32
 static int parse_resvconf(void);
+#else
+static void parse_windows_resolvers(void);
 #endif
 
 static void add_nameserver(const char *);