diff --git a/src/scout/scout.c b/src/scout/scout.c
index 0194e3497d..294c81e34d 100644
--- a/src/scout/scout.c
+++ b/src/scout/scout.c
@@ -15,6 +15,7 @@
 #include <afs/param.h>
 
 #include <roken.h>
+#include <opr/softsig.h>
 
 #undef	IN
 #include <afs/gtxwindows.h>		/*Generic window package */