diff --git a/include/uapi/linux/gsmmux.h b/include/uapi/linux/gsmmux.h
index c06742d528562e12761eda74f6b421e5fb370a39..ab055d8cddef7a94289f198becb435a56ae37ca3 100644
--- a/include/uapi/linux/gsmmux.h
+++ b/include/uapi/linux/gsmmux.h
@@ -3,6 +3,7 @@
 
 #include <linux/if.h>
 #include <linux/ioctl.h>
+#include <linux/types.h>
 
 struct gsm_config
 {