diff --git a/packages/babel-helper-to-multiple-sequence-expressions/src/index.js b/packages/babel-helper-to-multiple-sequence-expressions/src/index.js
index c9281c288..8f43dc84d 100644
--- a/packages/babel-helper-to-multiple-sequence-expressions/src/index.js
+++ b/packages/babel-helper-to-multiple-sequence-expressions/src/index.js
@@ -47,7 +47,7 @@ module.exports = function(t) {
         if (t.isExpression(node)) {
           exprs.push(node);
         } else if (t.isExpressionStatement(node)) {
-          exprs.push(node.expression);
+          if (node.expression) exprs.push(node.expression);
         } else if (t.isIfStatement(node)) {
           let consequent;
           if (node.consequent) {
diff --git a/packages/babel-preset-minify/__tests__/babili-es2015-tests.js b/packages/babel-preset-minify/__tests__/babili-es2015-tests.js
index 876aff558..8d21da040 100644
--- a/packages/babel-preset-minify/__tests__/babili-es2015-tests.js
+++ b/packages/babel-preset-minify/__tests__/babili-es2015-tests.js
@@ -26,4 +26,20 @@ describe("preset along with es2015", () => {
     cat = _obj.cat, _obj;
   `
   );
+
+  thePlugin(
+    "should fix simplify with es2015 - issue#632",
+    `
+      let obj, key;
+      if (1) ({k: key} = obj);
+      foo();
+    `,
+    `
+      "use strict";
+
+      var obj,
+          key = void 0;
+      key = obj.k, foo();
+    `
+  );
 });