diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 53629b8bc8a8..64dd22239b21 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -1,5 +1,6 @@
 Version 1.52
 ------------
+Fix oops on second mount to server when null auth is used.
 
 Version 1.51
 ------------
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 380ee9991f20..1102160f6661 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1790,7 +1790,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 
 	if (volume_info.nullauth) {
 		cFYI(1, ("null user"));
-		volume_info.username = NULL;
+		volume_info.username = "";
 	} else if (volume_info.username) {
 		/* BB fixme parse for domain name here */
 		cFYI(1, ("Username: %s", volume_info.username));