diff --git a/src/funcs.c b/src/funcs.c
index 75cab3a..9c4b8c7 100644
--- a/src/funcs.c
+++ b/src/funcs.c
@@ -43,6 +43,8 @@
 #include <time.h>
 #endif
 
+#include <fcntl.h>
+
 #ifndef R_OK
 #define R_OK 4
 #define W_OK 2