diff --git a/include/net/compat.h b/include/net/compat.h
index 9679f05..3c7d4e3 100644
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -33,7 +33,11 @@
 extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
 
 #else /* defined(CONFIG_COMPAT) */
-#define compat_msghdr	msghdr		/* to avoid compiler warnings */
+/*
+ * To avoid compiler warnings:
+ */
+#define compat_msghdr	msghdr
+#define compat_mmsghdr	mmsghdr
 #endif /* defined(CONFIG_COMPAT) */
 
 extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);