diff --git a/src/pkg/runtime/windows/386/signal.c b/src/pkg/runtime/windows/386/signal.c
index 663ed874bd..278bb7fc4c 100644
--- a/src/pkg/runtime/windows/386/signal.c
+++ b/src/pkg/runtime/windows/386/signal.c
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+#include "runtime.h"
+
 void
 initsig(int32 queue)
 {