diff --git a/include/compat/err.h b/include/compat/err.h
index 8b5b635..945a75d 100644
--- a/include/compat/err.h
+++ b/include/compat/err.h
@@ -72,16 +72,22 @@ warn(const char *fmt, ...)
 	fprintf(stderr, "%s\n", strerror(sverrno));
 }
 
+static inline void
+vwarnx(const char *fmt, va_list args)
+{
+	if (fmt != NULL)
+		vfprintf(stderr, fmt, args);
+	fprintf(stderr, "\n");
+}
+
 static inline void
 warnx(const char *fmt, ...)
 {
 	va_list ap;
 
 	va_start(ap, fmt);
-	if (fmt != NULL)
-		vfprintf(stderr, fmt, ap);
+	vwarnx(fmt, ap);
 	va_end(ap);
-	fprintf(stderr, "\n");
 }
 
 #endif