diff --git a/src/core/sys/windows/winerror.d b/src/core/sys/windows/winerror.d
index 1f9a5e5af3..71a2f98dac 100644
--- a/src/core/sys/windows/winerror.d
+++ b/src/core/sys/windows/winerror.d
@@ -2226,7 +2226,7 @@ enum : HRESULT {
 }
 
 
-enum : bool {
+enum : uint {
     SEVERITY_SUCCESS = 0,
     SEVERITY_ERROR   = 1
 }