diff --git a/global/crashhandler.h b/global/crashhandler.h
index da11558bd..af3e58198 100644
--- a/global/crashhandler.h
+++ b/global/crashhandler.h
@@ -2,6 +2,7 @@
 #define CRASHHANDLER_H
 
 #ifdef __GNUC__
+#include <signal.h>
 void handler(int sig);
 #endif