diff --git a/include/substrait-mlir/Dialect/Substrait/IR/CMakeLists.txt b/include/substrait-mlir/Dialect/Substrait/IR/CMakeLists.txt
index bb01665..7a3a84a 100644
--- a/include/substrait-mlir/Dialect/Substrait/IR/CMakeLists.txt
+++ b/include/substrait-mlir/Dialect/Substrait/IR/CMakeLists.txt
@@ -1,7 +1,7 @@
 add_mlir_dialect(SubstraitOps substrait)
 add_dependencies(MLIRSubstraitDialect MLIRSubstraitOpsIncGen)
 
-# Add SetOpKind attribute
+# Add Enums
 set(LLVM_TARGET_DEFINITIONS SubstraitOps.td)
 mlir_tablegen(SubstraitEnums.h.inc -gen-enum-decls)
 mlir_tablegen(SubstraitEnums.cpp.inc -gen-enum-defs)
diff --git a/lib/Target/SubstraitPB/Export.cpp b/lib/Target/SubstraitPB/Export.cpp
index e85e20e..010eca3 100644
--- a/lib/Target/SubstraitPB/Export.cpp
+++ b/lib/Target/SubstraitPB/Export.cpp
@@ -195,6 +195,7 @@ SubstraitExporter::exportType(Location loc, mlir::Type mlirType) {
     return std::move(type);
   }
 
+  // Handle tuple types.
   if (auto tupleType = llvm::dyn_cast<TupleType>(mlirType)) {
     auto structType = std::make_unique<proto::Type::Struct>();
     for (mlir::Type fieldType : tupleType.getTypes()) {