diff --git a/lib/Dialect/mhlo/transforms/transform_unranked_hlo.cc b/lib/Dialect/mhlo/transforms/transform_unranked_hlo.cc
index 61f51af..3b52288 100644
--- a/lib/Dialect/mhlo/transforms/transform_unranked_hlo.cc
+++ b/lib/Dialect/mhlo/transforms/transform_unranked_hlo.cc
@@ -57,6 +57,9 @@ namespace {
           sep fn(ErfOp) sep fn(ErfcOp) sep fn(IsInfOp) sep fn(LgammaOp)    \
               sep fn(SinhOp) sep fn(TanOp)
 
+// TODO(herhut): Generate these out of op definitions.
+#define MAP_CHLO_OPERATION_CWISE_BINARY(fn, sep) fn(ZetaOp)
+
 template <typename OpTy>
 inline void AddLegalOpOnRankedTensor(ConversionTarget *target) {
   target->addDynamicallyLegalOp<OpTy>([](OpTy op) {
@@ -484,21 +487,20 @@ struct TransformUnrankedHloPass
 
 void PopulateTransformUnrankedHloPatterns(MLIRContext *context,
                                           OwningRewritePatternList *patterns) {
-#define MAP_UNARY(op) ElementwiseOpConversion<mhlo::op>
-#define MAP_BINARY(op) ElementwiseOpConversion<mhlo::op>
-#define MAP_CHLO_UNARY(op) ElementwiseOpConversion<chlo::op>
+#define MAP_HLO(op) ElementwiseOpConversion<mhlo::op>
+#define MAP_CHLO(op) ElementwiseOpConversion<chlo::op>
 #define COMMA ,
   // clang-format off
   patterns->insert<
-      MAP_XLA_OPERATION_CWISE_UNARY(MAP_UNARY, COMMA),
-      MAP_XLA_OPERATION_CWISE_BINARY(MAP_BINARY, COMMA),
-      MAP_CHLO_OPERATION_CWISE_UNARY(MAP_CHLO_UNARY, COMMA),
+      MAP_XLA_OPERATION_CWISE_UNARY(MAP_HLO, COMMA),
+      MAP_XLA_OPERATION_CWISE_BINARY(MAP_HLO, COMMA),
+      MAP_CHLO_OPERATION_CWISE_UNARY(MAP_CHLO, COMMA),
+      MAP_CHLO_OPERATION_CWISE_BINARY(MAP_CHLO, COMMA),
       ElementwiseOpConversion<mhlo::CompareOp>,
       ElementwiseOpConversion<mhlo::SelectOp>>(context);
   // clang-format on
-#undef MAP_UNARY
-#undef MAP_BINARY
-#undef MAP_CHLO_UNARY
+#undef MAP_HLO
+#undef MAP_CHLO
 #undef COMMA
   chlo::PopulateForBroadcastingBinaryOp<
       ConvertUnrankedDynamicBroadcastBinaryOp>(context, patterns);