diff --git a/openbsd-compat/bsd-signal.c b/openbsd-compat/bsd-signal.c
index 979010e84..0b816a3a6 100644
--- a/openbsd-compat/bsd-signal.c
+++ b/openbsd-compat/bsd-signal.c
@@ -17,6 +17,7 @@
 #include "includes.h"
 
 #include <signal.h>
+#include <stdio.h>
 #include <string.h>
 #include <unistd.h>