diff --git a/freeglut/freeglut/src/x11/fg_joystick_x11.c b/freeglut/freeglut/src/x11/fg_joystick_x11.c
index 17dc2c3..a37388b 100644
--- a/freeglut/freeglut/src/x11/fg_joystick_x11.c
+++ b/freeglut/freeglut/src/x11/fg_joystick_x11.c
@@ -39,6 +39,8 @@
 #    include <sys/param.h>
 #endif
 
+#include <fcntl.h>
+
 
 /*this should be defined in a header file */
 #define MAX_NUM_JOYSTICKS  2