diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 4f0ebdec0..962230705 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -6245,6 +6245,12 @@ HFONT CreateFont(
   <define name="E_WPD_SMS_SERVICE_UNAVAILABLE" value="0x802A0066"/>
   <define name="NS_E_DRM_DEBUGGING_NOT_ALLOWED" value="0xC00D2767"/>
   <define name="NS_E_NOT_LICENSED" value="0xC00D00CD"/>
+  <!-- RpcDce.h: Impersonation Level Constants -->
+  <define name="RPC_C_IMP_LEVEL_DEFAULT" value="0"/>
+  <define name="RPC_C_IMP_LEVEL_ANONYMOUS" value="1"/>
+  <define name="RPC_C_IMP_LEVEL_IDENTIFY" value="2"/>
+  <define name="RPC_C_IMP_LEVEL_IMPERSONATE" value="3"/>
+  <define name="RPC_C_IMP_LEVEL_DELEGATE" value="4"/>
   <!-- Winerror.h: COM Error Codes (UI, Audio, DirectX, Codec) -->
   <define name="UI_E_CREATE_FAILED" value="0x802A0001"/>
   <define name="UI_E_SHUTDOWN_CALLED" value="0x802A0002"/>