diff --git a/Engine/source/terrain/glsl/terrFeatureGLSL.cpp b/Engine/source/terrain/glsl/terrFeatureGLSL.cpp
index 0756c6a19..7c80f9854 100644
--- a/Engine/source/terrain/glsl/terrFeatureGLSL.cpp
+++ b/Engine/source/terrain/glsl/terrFeatureGLSL.cpp
@@ -610,7 +610,7 @@ void TerrainDetailMapFeatGLSL::processPix(   Vector<ShaderComponent*> &component
    {
       Var *viewToTangent = getInViewToTangent(componentList);
 
-      meta->addStatement(new GenOp("   @ = lerp( @, @[2], min( @, @.w ) );\r\n",
+      meta->addStatement(new GenOp("   @ = lerp( @, tGetMatrix3Row(@, 2), min( @, @.w ) );\r\n",
          gbNormal, gbNormal, viewToTangent, detailBlend, inDet));
    }