diff --git a/changelog_unreleased/typescript/17650.md b/changelog_unreleased/typescript/17650.md
new file mode 100644
index 000000000..2896ecabd
--- /dev/null
+++ b/changelog_unreleased/typescript/17650.md
@@ -0,0 +1,15 @@
+#### Allow const without initializer (#17650 by @fisker)
+
+<!-- prettier-ignore -->
+```jsx
+// Input
+export const version: string;
+
+// Prettier stable (--parser=babel-ts)
+SyntaxError: Unexpected token (1:21)
+> 1 | export const version: string;
+    |                     ^
+
+// Prettier main
+export const version: string;
+```
diff --git a/src/language-js/parse/babel.js b/src/language-js/parse/babel.js
index fa6d993e5..aa51860d1 100644
--- a/src/language-js/parse/babel.js
+++ b/src/language-js/parse/babel.js
@@ -217,6 +217,16 @@ const allowedReasonCodes = new Set([
   ```
   */
   "ImportAttributesUseAssert",
+
+  /*
+  Allow const without initializer in `.d.ts` files
+  https://github.com/prettier/prettier/issues/17649
+
+  ```
+  export const version: string;
+  ```
+  */
+  "DeclarationMissingInitializer",
 ]);
 
 const babelParserOptionsCombinations = [appendPlugins(["jsx"])];
diff --git a/tests/format/misc/errors/js/variable-declarator/__snapshots__/format.test.js.snap b/tests/format/misc/errors/js/variable-declarator/__snapshots__/format.test.js.snap
index 37ddf0057..0ca39c408 100644
--- a/tests/format/misc/errors/js/variable-declarator/__snapshots__/format.test.js.snap
+++ b/tests/format/misc/errors/js/variable-declarator/__snapshots__/format.test.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`invalid-const.js [acorn] format 1`] = `
 "Unexpected token (1:10)
@@ -8,14 +8,6 @@ exports[`invalid-const.js [acorn] format 1`] = `
 Cause: Unexpected token (1:9)"
 `;
 
-exports[`invalid-const.js [babel] format 1`] = `
-"Missing initializer in const declaration. (1:10)
-> 1 | const foo;
-    |          ^
-  2 |
-Cause: Missing initializer in const declaration. (1:9)"
-`;
-
 exports[`invalid-const.js [espree] format 1`] = `
 "Unexpected token ; (1:10)
 > 1 | const foo;
diff --git a/tests/format/misc/errors/js/variable-declarator/format.test.js b/tests/format/misc/errors/js/variable-declarator/format.test.js
index 2ca3ea963..49cefd5cd 100644
--- a/tests/format/misc/errors/js/variable-declarator/format.test.js
+++ b/tests/format/misc/errors/js/variable-declarator/format.test.js
@@ -1 +1 @@
-runFormatTest(import.meta, ["babel", "acorn", "espree", "meriyah"]);
+runFormatTest(import.meta, ["acorn", "espree", "meriyah"]);
diff --git a/tests/format/misc/errors/typescript/modifiers/__snapshots__/format.test.js.snap b/tests/format/misc/errors/typescript/modifiers/__snapshots__/format.test.js.snap
index c0cec6283..a0b03a9b1 100644
--- a/tests/format/misc/errors/typescript/modifiers/__snapshots__/format.test.js.snap
+++ b/tests/format/misc/errors/typescript/modifiers/__snapshots__/format.test.js.snap
@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`snippet: #0 [babel-ts] format 1`] = `
 "'abstract' modifier cannot appear on a type member. (2:3)
@@ -1069,10 +1069,10 @@ Cause: 'async' modifier cannot be used here."
 `;
 
 exports[`snippet: #60 [babel-ts] format 1`] = `
-"Missing initializer in const declaration. (1:16)
+"Missing semicolon. (1:16)
 > 1 | const interface Foo {}
     |                ^
-Cause: Missing initializer in const declaration. (1:15)"
+Cause: Missing semicolon. (1:15)"
 `;
 
 exports[`snippet: #60 [typescript] format 1`] = `
@@ -1533,10 +1533,10 @@ Cause: 'async' modifier cannot be used here."
 `;
 
 exports[`snippet: #92 [babel-ts] format 1`] = `
-"Missing initializer in const declaration. (1:13)
+"Missing semicolon. (1:13)
 > 1 | const module Foo {}
     |             ^
-Cause: Missing initializer in const declaration. (1:12)"
+Cause: Missing semicolon. (1:12)"
 `;
 
 exports[`snippet: #92 [typescript] format 1`] = `
@@ -1547,10 +1547,10 @@ Cause: ',' expected."
 `;
 
 exports[`snippet: #93 [babel-ts] format 1`] = `
-"Missing initializer in const declaration. (1:16)
+"Missing semicolon. (1:16)
 > 1 | const namespace Foo {}
     |                ^
-Cause: Missing initializer in const declaration. (1:15)"
+Cause: Missing semicolon. (1:15)"
 `;
 
 exports[`snippet: #93 [typescript] format 1`] = `
diff --git a/tests/format/typescript/d-ts-files/__snapshots__/format.test.js.snap b/tests/format/typescript/d-ts-files/__snapshots__/format.test.js.snap
new file mode 100644
index 000000000..5f9767219
--- /dev/null
+++ b/tests/format/typescript/d-ts-files/__snapshots__/format.test.js.snap
@@ -0,0 +1,49 @@
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+
+exports[`const-without-initializer.d.ts [oxc-ts] format 1`] = `
+"Missing initializer in const declaration (1:17)
+> 1 | export const    version: string;
+    |                 ^^^^^^^^^^^^^^^
+  2 |"
+`;
+
+exports[`const-without-initializer.d.ts format 1`] = `
+====================================options=====================================
+parsers: ["typescript"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+export const    version: string;
+
+=====================================output=====================================
+export const version: string;
+
+================================================================================
+`;
+
+exports[`const-without-initializer-in-namespace.d.ts [oxc-ts] format 1`] = `
+"Missing initializer in const declaration (2:12)
+  1 | export namespace builders {
+> 2 |   const    breakParent: string;
+    |            ^^^^^^^^^^^^^^^^^^^
+  3 | }
+  4 |"
+`;
+
+exports[`const-without-initializer-in-namespace.d.ts format 1`] = `
+====================================options=====================================
+parsers: ["typescript"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+export namespace builders {
+  const    breakParent: string;
+}
+
+=====================================output=====================================
+export namespace builders {
+  const breakParent: string;
+}
+
+================================================================================
+`;
diff --git a/tests/format/typescript/d-ts-files/const-without-initializer-in-namespace.d.ts b/tests/format/typescript/d-ts-files/const-without-initializer-in-namespace.d.ts
new file mode 100644
index 000000000..6a3a1f34a
--- /dev/null
+++ b/tests/format/typescript/d-ts-files/const-without-initializer-in-namespace.d.ts
@@ -0,0 +1,3 @@
+export namespace builders {
+  const    breakParent: string;
+}
diff --git a/tests/format/typescript/d-ts-files/const-without-initializer.d.ts b/tests/format/typescript/d-ts-files/const-without-initializer.d.ts
new file mode 100644
index 000000000..56ebe816e
--- /dev/null
+++ b/tests/format/typescript/d-ts-files/const-without-initializer.d.ts
@@ -0,0 +1 @@
+export const    version: string;
diff --git a/tests/format/typescript/d-ts-files/format.test.js b/tests/format/typescript/d-ts-files/format.test.js
new file mode 100644
index 000000000..23c95ac1d
--- /dev/null
+++ b/tests/format/typescript/d-ts-files/format.test.js
@@ -0,0 +1,8 @@
+runFormatTest(import.meta, ["typescript"], {
+  errors: {
+    "oxc-ts": [
+      "const-without-initializer.d.ts",
+      "const-without-initializer-in-namespace.d.ts",
+    ],
+  },
+});