diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 204c8a508fb..76394eeef53 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2318,9 +2318,9 @@ namespace ts {
 
     function getSourceOfAssignment(node: Node): Node | undefined {
         return isExpressionStatement(node) &&
-            node.expression && isBinaryExpression(node.expression) &&
+            isBinaryExpression(node.expression) &&
             node.expression.operatorToken.kind === SyntaxKind.EqualsToken
-            ? node.expression.right
+            ? getRightMostAssignedExpression(node.expression)
             : undefined;
     }
 
diff --git a/tests/baselines/reference/constructorTagOnNestedBinaryExpression.symbols b/tests/baselines/reference/constructorTagOnNestedBinaryExpression.symbols
new file mode 100644
index 00000000000..669354c9916
--- /dev/null
+++ b/tests/baselines/reference/constructorTagOnNestedBinaryExpression.symbols
@@ -0,0 +1,14 @@
+=== tests/cases/conformance/jsdoc/constructorTagOnNestedBinaryExpression.js ===
+// Fixes #35021
+/** @constructor */
+a = b = function c () {
+>c : Symbol(c, Decl(constructorTagOnNestedBinaryExpression.js, 2, 7))
+
+    console.log(this)
+>console.log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
+>console : Symbol(console, Decl(lib.dom.d.ts, --, --))
+>log : Symbol(Console.log, Decl(lib.dom.d.ts, --, --))
+>this : Symbol(c, Decl(constructorTagOnNestedBinaryExpression.js, 2, 7))
+
+};
+
diff --git a/tests/baselines/reference/constructorTagOnNestedBinaryExpression.types b/tests/baselines/reference/constructorTagOnNestedBinaryExpression.types
new file mode 100644
index 00000000000..64659df1d2b
--- /dev/null
+++ b/tests/baselines/reference/constructorTagOnNestedBinaryExpression.types
@@ -0,0 +1,20 @@
+=== tests/cases/conformance/jsdoc/constructorTagOnNestedBinaryExpression.js ===
+// Fixes #35021
+/** @constructor */
+a = b = function c () {
+>a = b = function c () {    console.log(this)} : typeof c
+>a : error
+>b = function c () {    console.log(this)} : typeof c
+>b : error
+>function c () {    console.log(this)} : typeof c
+>c : typeof c
+
+    console.log(this)
+>console.log(this) : void
+>console.log : (message?: any, ...optionalParams: any[]) => void
+>console : Console
+>log : (message?: any, ...optionalParams: any[]) => void
+>this : this
+
+};
+
diff --git a/tests/cases/conformance/jsdoc/constructorTagOnNestedBinaryExpression.ts b/tests/cases/conformance/jsdoc/constructorTagOnNestedBinaryExpression.ts
new file mode 100644
index 00000000000..956f302ed6f
--- /dev/null
+++ b/tests/cases/conformance/jsdoc/constructorTagOnNestedBinaryExpression.ts
@@ -0,0 +1,8 @@
+// @allowjs: true
+// @noemit: true
+// @Filename: constructorTagOnNestedBinaryExpression.js
+// Fixes #35021
+/** @constructor */
+a = b = function c () {
+    console.log(this)
+};