diff --git a/lib/ntlm/ntlm.c b/lib/ntlm/ntlm.c
index 9d05ab99f..dbbbddd1f 100644
--- a/lib/ntlm/ntlm.c
+++ b/lib/ntlm/ntlm.c
@@ -440,7 +440,8 @@ heim_ntlm_decode_type1(const struct ntlm_buf *buf, struct ntlm_type1 *data)
 	CHECK(ret_string(in, 0, &hostname, &data->hostname), 0);
 
 out:
-    krb5_storage_free(in);
+    if (in)
+	krb5_storage_free(in);
     if (ret)
 	heim_ntlm_free_type1(data);