diff --git a/packages/babel-plugin-transform-typescript/src/index.js b/packages/babel-plugin-transform-typescript/src/index.js
index 97b23b454503..1c57de151f86 100644
--- a/packages/babel-plugin-transform-typescript/src/index.js
+++ b/packages/babel-plugin-transform-typescript/src/index.js
@@ -74,7 +74,11 @@ export default declare(
             );
           }
 
-          path.remove();
+          if (node.definite && node.decorators) {
+            node.definite = null;
+          } else {
+            path.remove();
+          }
         } else if (!allowDeclareFields && !node.value && !node.decorators) {
           path.remove();
         }