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-rw-r--r--src/mesa/swrast/s_context.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c
index d4321194a06..f373fde781b 100644
--- a/src/mesa/swrast/s_context.c
+++ b/src/mesa/swrast/s_context.c
@@ -549,6 +549,7 @@ _swrast_update_fragment_attribs(GLcontext *ctx)
if (ctx->FragmentProgram._Current) {
/* fragment program/shader */
attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;
+ attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */
}
else if (ctx->ATIFragmentShader._Enabled) {
attribsMask = ~0; /* XXX fix me */