diff --git a/dlls/secur32/lsa.c b/dlls/secur32/lsa.c
index fa765ed..6fa9972 100644
--- a/dlls/secur32/lsa.c
+++ b/dlls/secur32/lsa.c
@@ -96,7 +96,7 @@
         PLSA_STRING PackageName, PULONG AuthenticationPackage)
 {
     FIXME("%p %p %p stub\n", LsaHandle, PackageName, AuthenticationPackage);
-    AuthenticationPackage = NULL;
+    *AuthenticationPackage = 0;
     return STATUS_SUCCESS;
 }