diff --git a/dlls/slc/slc.c b/dlls/slc/slc.c
index b246a7dfc1a..d36ce88c4fd 100644
--- a/dlls/slc/slc.c
+++ b/dlls/slc/slc.c
@@ -74,5 +74,10 @@ HRESULT WINAPI SLOpen(HSLC *handle)
 {
     FIXME("(%p) stub\n", handle );
 
+    if (!handle)
+        return E_INVALIDARG;
+
+    *handle = (HSLC)0xdeadbeef;
+
     return S_OK;
 }