diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index edd3e981083..936fe425cc1 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -6086,8 +6086,6 @@ export const enum TypeFlags {
     PossiblyFalsy = DefinitelyFalsy | String | Number | BigInt | Boolean,
     /** @internal */
     Intrinsic = Any | Unknown | String | Number | BigInt | Boolean | BooleanLiteral | ESSymbol | Void | Undefined | Null | Never | NonPrimitive,
-    /** @internal */
-    Primitive = String | Number | BigInt | Boolean | Enum | EnumLiteral | ESSymbol | Void | Undefined | Null | Literal | UniqueESSymbol | TemplateLiteral,
     StringLike = String | StringLiteral | TemplateLiteral | StringMapping,
     NumberLike = Number | NumberLiteral | Enum,
     BigIntLike = BigInt | BigIntLiteral,
@@ -6096,6 +6094,8 @@ export const enum TypeFlags {
     ESSymbolLike = ESSymbol | UniqueESSymbol,
     VoidLike = Void | Undefined,
     /** @internal */
+    Primitive = StringLike | NumberLike | BigIntLike | BooleanLike | EnumLike | ESSymbolLike | VoidLike | Null,
+    /** @internal */
     DefinitelyNonNullable = StringLike | NumberLike | BigIntLike | BooleanLike | EnumLike | ESSymbolLike | Object | NonPrimitive,
     /** @internal */
     DisjointDomains = NonPrimitive | StringLike | NumberLike | BigIntLike | BooleanLike | ESSymbolLike | VoidLike | Null,
diff --git a/tests/cases/fourslash/completionsObjectLiteralUnionStringMappingType.ts b/tests/cases/fourslash/completionsObjectLiteralUnionStringMappingType.ts
new file mode 100644
index 00000000000..587bc54ad4a
--- /dev/null
+++ b/tests/cases/fourslash/completionsObjectLiteralUnionStringMappingType.ts
@@ -0,0 +1,26 @@
+/// <reference path="fourslash.ts" />
+
+////type UnionType = {
+////  key1: string;
+////} | {
+////  key2: number;
+////} | Uppercase<string>;
+////
+////const obj1: UnionType = {
+////  /*1*/
+////};
+////
+////const obj2: UnionType = {
+////  key1: "abc",
+////  /*2*/
+////};
+
+verify.completions({
+    marker: '1',
+    exact: [{ name: 'key1' }, { name: 'key2' }]
+})
+
+verify.completions({
+    marker: '2',
+    exact: [{ name: 'key2' }]
+})