1 files changed, 3 insertions, 0 deletions
diff --git a/src/sksl/SkSLGLSLCodeGenerator.cpp b/src/sksl/SkSLGLSLCodeGenerator.cpp
index 3c697d8e4b..d08c9135e1 100644
--- a/src/sksl/SkSLGLSLCodeGenerator.cpp
+++ b/src/sksl/SkSLGLSLCodeGenerator.cpp
@@ -689,6 +689,9 @@ void GLSLCodeGenerator::writeVariableReference(const VariableReference& ref) {
         case SK_FRAGCOORD_BUILTIN:
             this->writeFragCoord();
             break;
+        case SK_CLOCKWISE_BUILTIN:
+            this->write("gl_FrontFacing");
+            break;
         case SK_VERTEXID_BUILTIN:
             this->write("gl_VertexID");
             break;