diff --git a/packages/typescript/src/ast/scanner.ts b/packages/typescript/src/ast/scanner.ts
index 8e956bb967f54..df3a7415cec5d 100644
--- a/packages/typescript/src/ast/scanner.ts
+++ b/packages/typescript/src/ast/scanner.ts
@@ -2434,7 +2434,7 @@ export function createScanner(
 
         if (isIdentifierStart(ch)) {
             let char = ch;
-            while (pos < end && isIdentifierPart(char = codePointUnchecked(pos)) || char === CharacterCodes.minus) pos += charSize(char);
+            while (pos < end && (isIdentifierPart(char = codePointUnchecked(pos)) || char === CharacterCodes.minus)) pos += charSize(char);
             tokenValue = text.substring(tokenStart, pos);
             if (char === CharacterCodes.backslash) {
                 tokenValue += scanIdentifierParts();
diff --git a/packages/typescript/test/scanner.test.ts b/packages/typescript/test/scanner.test.ts
new file mode 100644
index 0000000000000..0f52a34040628
--- /dev/null
+++ b/packages/typescript/test/scanner.test.ts
@@ -0,0 +1,23 @@
+import {
+    createScanner,
+    SyntaxKind,
+} from "@typescript/typescript/unstable/ast";
+import assert from "node:assert";
+import { test } from "node:test";
+
+test("scanJsDocToken respects a range ending in a hyphen", () => {
+    const text = "/** x-yy";
+    const scanner = createScanner(/*skipTrivia*/ true);
+    scanner.setText(text);
+
+    scanner.scanRange(3, text.length - 5, () => {
+        const tokens = [];
+        while (scanner.scanJsDocToken() !== SyntaxKind.EndOfFile) {
+            tokens.push([scanner.getToken(), scanner.getTokenText()]);
+        }
+        assert.deepStrictEqual(tokens, [
+            [SyntaxKind.WhitespaceTrivia, " "],
+            [SyntaxKind.Identifier, "x-"],
+        ]);
+    });
+});