diff --git a/src/gpu/effects/GrDistanceFieldGeoProc.cpp b/src/gpu/effects/GrDistanceFieldGeoProc.cpp
index b8548bb..c63ce8f 100644
--- a/src/gpu/effects/GrDistanceFieldGeoProc.cpp
+++ b/src/gpu/effects/GrDistanceFieldGeoProc.cpp
@@ -286,7 +286,9 @@
     }
     SkMatrix localMatrix = GrTest::TestMatrix(d->fRandom);
     GrColor color = GrRandomColor(d->fRandom);
+#ifdef SK_GAMMA_APPLY_TO_A8
     float lum = d->fRandom->nextF();
+#endif
     return GrDistanceFieldA8TextGeoProc::Make(color,
                                               proxies,
                                               samplerState,