diff --git a/xla/hlo/evaluator/hlo_evaluator.cc b/xla/hlo/evaluator/hlo_evaluator.cc
index 9b51dca772101..8eb6caf24ab88 100644
--- a/xla/hlo/evaluator/hlo_evaluator.cc
+++ b/xla/hlo/evaluator/hlo_evaluator.cc
@@ -535,8 +535,6 @@ std::optional<DynamicOrStaticInteger> EvaluateWhileLoopParamInitValue(
 
 namespace internal {
 
-constexpr absl::string_view kEvalErrorDetailUrl = "EvalErrorDetailUrl";
-
 std::optional<EvalErrorDetail> ParseEvalErrorDetail(const absl::Status& error) {
   auto error_detail = error.GetPayload(kEvalErrorDetailUrl);
   if (!error_detail.has_value() || error_detail->empty()) {
diff --git a/xla/hlo/evaluator/hlo_evaluator.h b/xla/hlo/evaluator/hlo_evaluator.h
index 2f91c39c857c9..37dbb9efda855 100644
--- a/xla/hlo/evaluator/hlo_evaluator.h
+++ b/xla/hlo/evaluator/hlo_evaluator.h
@@ -530,7 +530,7 @@ enum class EvalErrorDetail : uint32_t {
   kDynamicValueDependence = 0,
 };
 
-extern const absl::string_view kEvalErrorDetailUrl;
+extern const absl::string_view kEvalErrorDetailUrl = "EvalErrorDetailUrl";
 
 std::optional<EvalErrorDetail> ParseEvalErrorDetail(const absl::Status& error);