diff --git a/client/src/templates/Challenges/redux/index.js b/client/src/templates/Challenges/redux/index.js
index b87971dd3f..9fb862c262 100644
--- a/client/src/templates/Challenges/redux/index.js
+++ b/client/src/templates/Challenges/redux/index.js
@@ -130,6 +130,9 @@ export const createFiles = createAction(types.createFiles, challengeFiles =>
 
 // TODO: secure with tests
 function getLines(contents, range) {
+  if (isEmpty(range)) {
+    return '';
+  }
   const lines = contents.split('\n');
   const editableLines = isEmpty(lines)
     ? []