diff --git a/packages/babel-plugin-proposal-object-rest-spread/src/index.js b/packages/babel-plugin-proposal-object-rest-spread/src/index.js
index ca8e53b24f..0103816a23 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/src/index.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/src/index.js
@@ -96,10 +96,14 @@ export default declare((api, opts) => {
     const bindings = path.getOuterBindingIdentifierPaths();
 
     Object.keys(bindings).forEach(bindingName => {
-      if (path.scope.getBinding(bindingName).references > 1) {
+      const bindingParentPath = bindings[bindingName].parentPath;
+      if (
+        path.scope.getBinding(bindingName).references > 1 ||
+        !bindingParentPath.isObjectProperty()
+      ) {
         return;
       }
-      bindings[bindingName].parentPath.remove();
+      bindingParentPath.remove();
     });
   }
 
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/input.js
new file mode 100644
index 0000000000..fc0991bbf7
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/input.js
@@ -0,0 +1,8 @@
+const get = () => {
+  fireTheMissiles();
+  return 3;
+};
+
+const f = ({ a = get(), b, c, ...z }) => {
+  const v = b + 3;
+};
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/options.json b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/options.json
new file mode 100644
index 0000000000..0333615e14
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/options.json
@@ -0,0 +1,4 @@
+{
+  "presets": [ [ "env", { "targets": { "node": "8" } } ] ],
+  "plugins": [ [ "proposal-object-rest-spread", { "loose": true } ] ]
+}
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/output.js
new file mode 100644
index 0000000000..62b6e704ab
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-8323/output.js
@@ -0,0 +1,16 @@
+function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }
+
+const get = () => {
+  fireTheMissiles();
+  return 3;
+};
+
+const f = (_ref) => {
+  let {
+    a = get(),
+    b
+  } = _ref,
+      z = _objectWithoutPropertiesLoose(_ref, ["a", "b", "c"]);
+
+  const v = b + 3;
+};