diff --git a/samplecode/Sample3D.cpp b/samplecode/Sample3D.cpp
index 9d591a8..1c55a3f 100644
--- a/samplecode/Sample3D.cpp
+++ b/samplecode/Sample3D.cpp
@@ -368,8 +368,8 @@
         fBmpShader = img->makeShader(SkMatrix::Scale(2, 2));
 
         const char code[] = R"(
-            in shader color_map;
-            in shader normal_map;
+            uniform shader color_map;
+            uniform shader normal_map;
 
             layout (marker=local_to_world)          uniform float4x4 localToWorld;
             layout (marker=normals(local_to_world)) uniform float4x4 localToWorldAdjInv;