diff --git a/dlls/ole32/compobj_private.h b/dlls/ole32/compobj_private.h
index a7c6dfa67ce..43e6e2515b9 100644
--- a/dlls/ole32/compobj_private.h
+++ b/dlls/ole32/compobj_private.h
@@ -203,7 +203,6 @@ HRESULT FTMarshalCF_Create(REFIID riid, LPVOID *ppv);
 
 /* Stub Manager */
 
-ULONG stub_manager_int_addref(struct stub_manager *This);
 ULONG stub_manager_int_release(struct stub_manager *This);
 struct stub_manager *new_stub_manager(APARTMENT *apt, IUnknown *object);
 ULONG stub_manager_ext_addref(struct stub_manager *m, ULONG refs, BOOL tableweak);
diff --git a/dlls/ole32/stubmanager.c b/dlls/ole32/stubmanager.c
index c15e9d31c58..12813c6a5d7 100644
--- a/dlls/ole32/stubmanager.c
+++ b/dlls/ole32/stubmanager.c
@@ -251,7 +251,7 @@ static void stub_manager_delete(struct stub_manager *m)
 }
 
 /* increments the internal refcount */
-ULONG stub_manager_int_addref(struct stub_manager *This)
+static ULONG stub_manager_int_addref(struct stub_manager *This)
 {
     ULONG refs;