diff --git a/dlls/jscript/function.c b/dlls/jscript/function.c
index e2f1b3743b0..1b1b4e70ab0 100644
--- a/dlls/jscript/function.c
+++ b/dlls/jscript/function.c
@@ -408,7 +408,7 @@ static HRESULT Function_apply(DispatchEx *dispex, LCID lcid, WORD flags, DISPPAR
     FunctionInstance *function;
     DISPPARAMS args = {NULL,NULL,0,0};
     DWORD argc, i;
-    IDispatch *this_obj;
+    IDispatch *this_obj = NULL;
     HRESULT hres = S_OK;
 
     TRACE("\n");