diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c
index 62857dd..ff58736 100644
--- a/src/mesa/swrast/s_context.c
+++ b/src/mesa/swrast/s_context.c
@@ -146,11 +146,7 @@ _swrast_update_polygon( GLcontext *ctx )
       backface_sign = 0.0;
    }
 
-   SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;
-
-   /* This is for front/back-face determination, but not for culling */
-   SWRAST_CONTEXT(ctx)->_BackfaceSign
-      = (ctx->Polygon.FrontFace == GL_CW) ? -1.0 : 1.0;
+   SWRAST_CONTEXT(ctx)->_BackfaceSign = backface_sign;
 }