diff --git a/include/uapi/linux/keyctl.h b/include/uapi/linux/keyctl.h
index 201c6644b2376846f3fccf16bc64d99a5aabdfd4..ef16df06642a93462e1bd5d535ec3119af3adc22 100644
--- a/include/uapi/linux/keyctl.h
+++ b/include/uapi/linux/keyctl.h
@@ -70,8 +70,8 @@ struct keyctl_dh_params {
 };
 
 struct keyctl_kdf_params {
-	char *hashname;
-	char *otherinfo;
+	char __user *hashname;
+	char __user *otherinfo;
 	__u32 otherinfolen;
 	__u32 __spare[8];
 };