diff --git a/dlls/d3d10_1/d3d10_1_main.c b/dlls/d3d10_1/d3d10_1_main.c
index 721fe7d6373..a619004cabb 100644
--- a/dlls/d3d10_1/d3d10_1_main.c
+++ b/dlls/d3d10_1/d3d10_1_main.c
@@ -63,18 +63,6 @@ static const char *debug_d3d10_feature_level(D3D10_FEATURE_LEVEL1 feature_level)
 
 #undef WINE_D3D10_TO_STR
 
-BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, void *reserved)
-{
-    switch (reason)
-    {
-        case DLL_PROCESS_ATTACH:
-            DisableThreadLibraryCalls(inst);
-            break;
-    }
-
-    return TRUE;
-}
-
 HRESULT WINAPI D3D10CreateDevice1(IDXGIAdapter *adapter, D3D10_DRIVER_TYPE driver_type, HMODULE swrast,
         UINT flags, D3D10_FEATURE_LEVEL1 hw_level, UINT sdk_version, ID3D10Device1 **device)
 {