diff --git a/src/core/SkDraw_vertices.cpp b/src/core/SkDraw_vertices.cpp
index c0161cd530..1b21424bad 100644
--- a/src/core/SkDraw_vertices.cpp
+++ b/src/core/SkDraw_vertices.cpp
@@ -16,6 +16,7 @@
 #include "src/core/SkRasterClip.h"
 #include "src/core/SkRasterPipeline.h"
 #include "src/core/SkScan.h"
+#include "src/core/SkVM.h"
 #include "src/core/SkVertState.h"
 #include "src/core/SkVerticesPriv.h"
 #include "src/shaders/SkComposeShader.h"
@@ -147,6 +148,15 @@ protected:
         return true;
     }
 
+    skvm::Color onProgram(skvm::Builder*,
+                          skvm::Coord, skvm::Coord, skvm::Color,
+                          const SkMatrixProvider&, const SkMatrix*,
+                          SkFilterQuality, const SkColorInfo&,
+                          skvm::Uniforms*, SkArenaAlloc*) const override {
+        // TODO?
+        return {};
+    }
+
 private:
     bool isOpaque() const override { return fIsOpaque; }
     // For serialization.  This will never be called.
diff --git a/src/shaders/SkPerlinNoiseShader.cpp b/src/shaders/SkPerlinNoiseShader.cpp
index 5260ff32bf..73f6d0a88d 100644
--- a/src/shaders/SkPerlinNoiseShader.cpp
+++ b/src/shaders/SkPerlinNoiseShader.cpp
@@ -16,6 +16,7 @@
 #include "src/core/SkArenaAlloc.h"
 #include "src/core/SkMatrixProvider.h"
 #include "src/core/SkReadBuffer.h"
+#include "src/core/SkVM.h"
 #include "src/core/SkWriteBuffer.h"
 
 #if SK_SUPPORT_GPU
@@ -301,6 +302,15 @@ public:
     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
 #endif
 
+    skvm::Color onProgram(skvm::Builder*,
+                          skvm::Coord, skvm::Coord, skvm::Color,
+                          const SkMatrixProvider&, const SkMatrix*,
+                          SkFilterQuality, const SkColorInfo&,
+                          skvm::Uniforms*, SkArenaAlloc*) const override {
+        // TODO?
+        return {};
+    }
+
 protected:
     void flatten(SkWriteBuffer&) const override;
 #ifdef SK_ENABLE_LEGACY_SHADERCONTEXT
diff --git a/src/shaders/SkShader.cpp b/src/shaders/SkShader.cpp
index 4e8c79f178..0ee0913b4b 100644
--- a/src/shaders/SkShader.cpp
+++ b/src/shaders/SkShader.cpp
@@ -238,15 +238,6 @@ skvm::Color SkShaderBase::program(skvm::Builder* p,
     return {};
 }
 
-skvm::Color SkShaderBase::onProgram(skvm::Builder*,
-                                    skvm::Coord device, skvm::Coord local, skvm::Color paint,
-                                    const SkMatrixProvider&, const SkMatrix* localM,
-                                    SkFilterQuality quality, const SkColorInfo& dst,
-                                    skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const {
-    // SkDebugf("cannot onProgram %s\n", this->getTypeName());
-    return {};
-}
-
 // need a cheap way to invert the alpha channel of a shader (i.e. 1 - a)
 sk_sp<SkShader> SkShaderBase::makeInvertAlpha() const {
     return this->makeWithColorFilter(SkColorFilters::Blend(0xFFFFFFFF, SkBlendMode::kSrcOut));
diff --git a/src/shaders/SkShaderBase.h b/src/shaders/SkShaderBase.h
index 1e74f833e9..35a5beb9a8 100644
--- a/src/shaders/SkShaderBase.h
+++ b/src/shaders/SkShaderBase.h
@@ -252,7 +252,7 @@ private:
                                   skvm::Coord device, skvm::Coord local, skvm::Color paint,
                                   const SkMatrixProvider&, const SkMatrix* localM,
                                   SkFilterQuality quality, const SkColorInfo& dst,
-                                  skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const;
+                                  skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const = 0;
 
     using INHERITED = SkShader;
 };