diff --git a/modules/script.c b/modules/script.c
index f323635..2ddd722 100644
--- a/modules/script.c
+++ b/modules/script.c
@@ -4,6 +4,7 @@
 #include <errno.h>
 #include <assert.h>
 #include <unistd.h>
+#include <libgen.h>
 
 #include <poll.h>
 #include <fcntl.h>
diff --git a/modules/xwindow.c b/modules/xwindow.c
index 3c8655e..3925f4f 100644
--- a/modules/xwindow.c
+++ b/modules/xwindow.c
@@ -4,6 +4,7 @@
 #include <assert.h>
 #include <unistd.h>
 #include <threads.h>
+#include <libgen.h>
 
 #include <sys/stat.h>
 #include <fcntl.h>