diff --git a/src/sksl/SkSLCPPCodeGenerator.h b/src/sksl/SkSLCPPCodeGenerator.h
index 014f917..39255d6 100644
--- a/src/sksl/SkSLCPPCodeGenerator.h
+++ b/src/sksl/SkSLCPPCodeGenerator.h
@@ -68,6 +68,8 @@
 
     void writeVarInitializer(const Variable& var, const Expression& value) override;
 
+    void writeInputVars() override;
+
     void writePrivateVars();
 
     void writePrivateVarValues();