diff --git a/dlls/diasymreader/writer.c b/dlls/diasymreader/writer.c
index 55e0615c58e..bbf5b45dcfa 100644
--- a/dlls/diasymreader/writer.c
+++ b/dlls/diasymreader/writer.c
@@ -602,7 +602,7 @@ HRESULT SymWriter_CreateInstance(REFIID iid, void **ppv)
     This->iface.lpVtbl = &SymWriter_Vtbl;
     This->IPdbWriter_iface.lpVtbl = &SymWriter_PdbWriter_Vtbl;
     This->ref = 1;
-    InitializeCriticalSection(&This->lock);
+    InitializeCriticalSectionEx(&This->lock, 0, RTL_CRITICAL_SECTION_FLAG_FORCE_DEBUG_INFO);
     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": SymWriter.lock");
     UuidCreate(&This->pdb_guid);
     This->pdb_age = 1;