diff --git a/src/util.c b/src/util.c
index 029433f..244be85 100644
--- a/src/util.c
+++ b/src/util.c
@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <fcntl.h>
 #ifdef HAVE_SYS_FILE_H
 #    include <sys/file.h>
 #endif