diff --git a/include/uapi/linux/ppp-ioctl.h b/include/uapi/linux/ppp-ioctl.h
index 2d9a8859550a00a16cd3178ccd0b8444bd861d60..63a23a3b8bb75c47e721688a6a5c0b6e6d36f033 100644
--- a/include/uapi/linux/ppp-ioctl.h
+++ b/include/uapi/linux/ppp-ioctl.h
@@ -12,6 +12,7 @@
 
 #include <linux/types.h>
 #include <linux/compiler.h>
+#include <linux/ppp_defs.h>
 
 /*
  * Bit definitions for flags argument to PPPIOCGFLAGS/PPPIOCSFLAGS.