diff --git a/packages/babel-plugin-transform-es2015-parameters/src/params.js b/packages/babel-plugin-transform-es2015-parameters/src/params.js
index 99e80cc7f6..de87c35d8f 100644
--- a/packages/babel-plugin-transform-es2015-parameters/src/params.js
+++ b/packages/babel-plugin-transform-es2015-parameters/src/params.js
@@ -73,11 +73,9 @@ export default function convertFunctionParams(path) {
         DEFAULT_VALUE: right.node,
         ARGUMENT_KEY: t.numericLiteral(i),
       });
-      defNode._blockHoist = node.params.length - i;
       body.push(defNode);
     } else if (firstOptionalIndex !== null) {
       const defNode = buildArgumentsAccess(param.node, t.numericLiteral(i));
-      defNode._blockHoist = node.params.length - i;
       body.push(defNode);
     } else if (param.isObjectPattern() || param.isArrayPattern()) {
       const uid = path.scope.generateUidIdentifier("ref");
@@ -85,7 +83,6 @@ export default function convertFunctionParams(path) {
       const defNode = t.variableDeclaration("let", [
         t.variableDeclarator(param.node, uid),
       ]);
-      defNode._blockHoist = node.params.length - i;
       body.push(defNode);
 
       param.replaceWith(uid);
diff --git a/packages/babel-plugin-transform-es2015-parameters/src/rest.js b/packages/babel-plugin-transform-es2015-parameters/src/rest.js
index 5463633259..4617f8f5d2 100644
--- a/packages/babel-plugin-transform-es2015-parameters/src/rest.js
+++ b/packages/babel-plugin-transform-es2015-parameters/src/rest.js
@@ -316,12 +316,8 @@ export default function convertFunctionRest(path) {
   });
 
   if (state.deopted) {
-    loop._blockHoist = node.params.length + 1;
     node.body.body.unshift(loop);
   } else {
-    // perform allocation at the lowest common ancestor of all references
-    loop._blockHoist = 1;
-
     let target = path
       .getEarliestCommonAncestorFrom(state.references)
       .getStatementParent();
diff --git a/packages/babel-plugin-transform-object-rest-spread/src/index.js b/packages/babel-plugin-transform-object-rest-spread/src/index.js
index 2583ff1d13..c96358fed1 100644
--- a/packages/babel-plugin-transform-object-rest-spread/src/index.js
+++ b/packages/babel-plugin-transform-object-rest-spread/src/index.js
@@ -113,7 +113,6 @@ export default function({ types: t }) {
       const declar = t.variableDeclaration("let", [
         t.variableDeclarator(paramPath.node, uid),
       ]);
-      declar._blockHoist = i ? numParams - i : 1;
 
       parentPath.ensureBlock();
       parentPath.get("body").unshiftContainer("body", declar);
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/expected.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/expected.js
index a11f2f892a..6780bc3d89 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/expected.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/expected.js
@@ -1,7 +1,6 @@
 function render(Component) {
-  var text = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
-
-  var _ref = <Component text={text} />;
+  var text = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '',
+      _ref = <Component text={text} />;
 
   return function () {
     return _ref;