diff --git a/src/language-js/needs-parens.js b/src/language-js/needs-parens.js
index b6c769cf110e..522accea831b 100644
--- a/src/language-js/needs-parens.js
+++ b/src/language-js/needs-parens.js
@@ -79,10 +79,9 @@ function needsParens(path, options) {
 
     // `for ((let.a) of []);`
     if (name === "object" && node.name === "let") {
-      const statement = path.findAncestor(
+      const expression = path.findAncestor(
         (node) => node.type === "ForOfStatement"
-      );
-      const expression = statement.left;
+      )?.left
       if (
         expression &&
         startsWithNoLookaheadToken(
diff --git a/tests/format/js/identifier/for-of/__snapshots__/jsfmt.spec.js.snap b/tests/format/js/identifier/for-of/__snapshots__/jsfmt.spec.js.snap
index f4330e8117fc..f408f6871811 100644
--- a/tests/format/js/identifier/for-of/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/js/identifier/for-of/__snapshots__/jsfmt.spec.js.snap
@@ -37,6 +37,9 @@ for (foo of let[a]);
 for ((let.a) of foo);
 for ((let[a]) of foo);
 
+for ((let.a) in foo);
+for ((let[a]) in foo);
+
 =====================================output=====================================
 for ((let) of foo);
 for (foo of let);
@@ -45,5 +48,8 @@ for (foo of let[a]);
 for ((let).a of foo);
 for ((let)[a] of foo);
 
+for (let.a in foo);
+for ((let)[a] in foo);
+
 ================================================================================
 `;
diff --git a/tests/format/js/identifier/for-of/let.js b/tests/format/js/identifier/for-of/let.js
index ede6a77d3664..8e40c4e48230 100644
--- a/tests/format/js/identifier/for-of/let.js
+++ b/tests/format/js/identifier/for-of/let.js
@@ -4,3 +4,6 @@ for (foo of let.a);
 for (foo of let[a]);
 for ((let.a) of foo);
 for ((let[a]) of foo);
+
+for ((let.a) in foo);
+for ((let[a]) in foo);