diff --git a/kbfunc.c b/kbfunc.c
index 1920c5d..b6c0a0d 100644
--- a/kbfunc.c
+++ b/kbfunc.c
@@ -25,6 +25,7 @@
 #include <err.h>
 #include <errno.h>
 #include <paths.h>
+#include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/xevents.c b/xevents.c
index eddf4fe..0d91067 100644
--- a/xevents.c
+++ b/xevents.c
@@ -29,6 +29,7 @@
 
 #include <err.h>
 #include <errno.h>
+#include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>