diff --git a/src/checks.c b/src/checks.c
index 59d9514b22..0571c58ef0 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -15,6 +15,7 @@
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>