diff --git a/.chronus/changes/remove_unionenumvariant-2024-7-20-10-17-16.md b/.chronus/changes/remove_unionenumvariant-2024-7-20-10-17-16.md
new file mode 100644
index 0000000000..0424e7a7fb
--- /dev/null
+++ b/.chronus/changes/remove_unionenumvariant-2024-7-20-10-17-16.md
@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+remove import of `UnionEnumVariant`
\ No newline at end of file
diff --git a/packages/typespec-client-generator-core/src/types.ts b/packages/typespec-client-generator-core/src/types.ts
index 66edc2fdcc..1a632da210 100644
--- a/packages/typespec-client-generator-core/src/types.ts
+++ b/packages/typespec-client-generator-core/src/types.ts
@@ -113,7 +113,6 @@ import {
 } from "./public-utils.js";
 
 import { getVersions } from "@typespec/versioning";
-import { UnionEnumVariant } from "../../typespec-azure-core/dist/src/helpers/union-enums.js";
 import { getSdkHttpParameter, isSdkHttpParameter } from "./http.js";
 
 export function getTypeSpecBuiltInType(
@@ -790,20 +789,17 @@ export function getSdkModelWithDiagnostics(
 
 function getSdkEnumValueType(
   context: TCGCContext,
-  values:
-    | IterableIterator<EnumMember>
-    | IterableIterator<UnionEnumVariant<string>>
-    | IterableIterator<UnionEnumVariant<number>>
+  values: (string | number | undefined)[]
 ): [SdkBuiltInType, readonly Diagnostic[]] {
   const diagnostics = createDiagnosticCollector();
   let kind: "string" | "int32" | "float32" = "string";
   for (const value of values) {
-    if (typeof value.value === "number") {
-      kind = intOrFloat(value.value);
+    if (typeof value === "number") {
+      kind = intOrFloat(value);
       if (kind === "float32") {
         break;
       }
-    } else if (typeof value.value === "string") {
+    } else if (typeof value === "string") {
       kind = "string";
       break;
     }
@@ -880,7 +876,12 @@ function getSdkEnumWithDiagnostics(
       details: docWrapper.details,
       doc: getDoc(context.program, type),
       summary: getSummary(context.program, type),
-      valueType: diagnostics.pipe(getSdkEnumValueType(context, type.members.values())),
+      valueType: diagnostics.pipe(
+        getSdkEnumValueType(
+          context,
+          [...type.members.values()].map((v) => v.value)
+        )
+      ),
       values: [],
       isFixed: true, // enums are always fixed after we switch to use union to represent extensible enum
       isFlags: false,
@@ -950,7 +951,12 @@ export function getSdkUnionEnumWithDiagnostics(
       summary: getSummary(context.program, union),
       valueType:
         diagnostics.pipe(getUnionAsEnumValueType(context, type.union)) ??
-        diagnostics.pipe(getSdkEnumValueType(context, type.flattenedMembers.values())),
+        diagnostics.pipe(
+          getSdkEnumValueType(
+            context,
+            [...type.flattenedMembers.values()].map((v) => v.value)
+          )
+        ),
       values: [],
       isFixed: !type.open,
       isFlags: false,
@@ -991,7 +997,12 @@ function getKnownValuesEnum(
         details: docWrapper.details,
         doc: getDoc(context.program, type),
         summary: getSummary(context.program, type),
-        valueType: diagnostics.pipe(getSdkEnumValueType(context, knownValues.members.values())),
+        valueType: diagnostics.pipe(
+          getSdkEnumValueType(
+            context,
+            [...knownValues.members.values()].map((v) => v.value)
+          )
+        ),
         values: [],
         isFixed: false,
         isFlags: false,