diff --git a/src/sksl/SkSLCompiler.h b/src/sksl/SkSLCompiler.h
index eb2fc45b51..384562fe3e 100644
--- a/src/sksl/SkSLCompiler.h
+++ b/src/sksl/SkSLCompiler.h
@@ -24,6 +24,7 @@
 #define SK_OUTCOLOR_BUILTIN            10004
 #define SK_TRANSFORMEDCOORDS2D_BUILTIN 10005
 #define SK_TEXTURESAMPLERS_BUILTIN     10006
+#define SK_OUT_BUILTIN                 10007
 #define SK_FRAGCOORD_BUILTIN              15
 #define SK_VERTEXID_BUILTIN                5
 #define SK_INSTANCEID_BUILTIN              6
diff --git a/src/sksl/SkSLSPIRVCodeGenerator.cpp b/src/sksl/SkSLSPIRVCodeGenerator.cpp
index 02bd336b55..6e008471ea 100644
--- a/src/sksl/SkSLSPIRVCodeGenerator.cpp
+++ b/src/sksl/SkSLSPIRVCodeGenerator.cpp
@@ -2436,7 +2436,7 @@ void SPIRVCodeGenerator::writeLayout(const Layout& layout, SpvId target) {
         fCapabilities |= (((uint64_t) 1) << SpvCapabilityInputAttachment);
     }
     if (layout.fBuiltin >= 0 && layout.fBuiltin != SK_FRAGCOLOR_BUILTIN &&
-        layout.fBuiltin != SK_IN_BUILTIN) {
+        layout.fBuiltin != SK_IN_BUILTIN && layout.fBuiltin != SK_OUT_BUILTIN) {
         this->writeInstruction(SpvOpDecorate, target, SpvDecorationBuiltIn, layout.fBuiltin,
                                fDecorationBuffer);
     }
@@ -2949,8 +2949,9 @@ void SPIRVCodeGenerator::writeInstructions(const Program& program, OutputStream&
                 intf.fSizes.emplace_back(new IntLiteral(fContext, -1, skInSize));
             }
             SpvId id = this->writeInterfaceBlock(intf);
-            if ((intf.fVariable.fModifiers.fFlags & Modifiers::kIn_Flag) ||
-                (intf.fVariable.fModifiers.fFlags & Modifiers::kOut_Flag)) {
+            if (((intf.fVariable.fModifiers.fFlags & Modifiers::kIn_Flag) ||
+                (intf.fVariable.fModifiers.fFlags & Modifiers::kOut_Flag)) &&
+                intf.fVariable.fModifiers.fLayout.fBuiltin == -1) {
                 interfaceVars.insert(id);
             }
         }
@@ -2976,8 +2977,10 @@ void SPIRVCodeGenerator::writeInstructions(const Program& program, OutputStream&
     for (auto entry : fVariableMap) {
         const Variable* var = entry.first;
         if (var->fStorage == Variable::kGlobal_Storage &&
-                ((var->fModifiers.fFlags & Modifiers::kIn_Flag) ||
-                 (var->fModifiers.fFlags & Modifiers::kOut_Flag))) {
+            ((var->fModifiers.fFlags & Modifiers::kIn_Flag) ||
+             (var->fModifiers.fFlags & Modifiers::kOut_Flag)) &&
+             var->fModifiers.fLayout.fBuiltin != SK_IN_BUILTIN &&
+             var->fModifiers.fLayout.fBuiltin != SK_OUT_BUILTIN) {
             interfaceVars.insert(entry.second);
         }
     }
diff --git a/src/sksl/ir/SkSLSwizzle.h b/src/sksl/ir/SkSLSwizzle.h
index 5512c852b3..d07f16efc2 100644
--- a/src/sksl/ir/SkSLSwizzle.h
+++ b/src/sksl/ir/SkSLSwizzle.h
@@ -79,7 +79,7 @@ static const Type& get_type(const Context& context, Expression& value, size_t co
 }
 
 /**
- * Represents a vector swizzle operation such as 'float21, 2, 3).zyx'.
+ * Represents a vector swizzle operation such as 'float2(1, 2, 3).zyx'.
  */
 struct Swizzle : public Expression {
     Swizzle(const Context& context, std::unique_ptr<Expression> base, std::vector<int> components)
diff --git a/src/sksl/sksl_geom.inc b/src/sksl/sksl_geom.inc
index 1ce5265c19..dcd85f1aed 100644
--- a/src/sksl/sksl_geom.inc
+++ b/src/sksl/sksl_geom.inc
@@ -8,7 +8,7 @@ layout(builtin=10002) in sk_PerVertex {
   layout(builtin=3) float sk_ClipDistance[1];
 } sk_in[];
 
-out sk_PerVertex {
+layout(builtin=10007) out sk_PerVertex {
     layout(builtin=0) float4 sk_Position;
     layout(builtin=1) float sk_PointSize;
     layout(builtin=3) float sk_ClipDistance[1];