diff --git a/code/4. Data loader.ipynb b/code/4. Data loader.ipynb
index 330e912dc45b581f0f2a54cfd2fa764fc17ba17e..1d00a235dddcc8832c8c1ea45ba810a80d427f10 100755
--- a/code/4. Data loader.ipynb	
+++ b/code/4. Data loader.ipynb	
@@ -75,7 +75,7 @@
     "                    annotation = {}\n",
     "                    annotation['name'] = name\n",
     "                    annotation['configuration'] = configuration\n",
-    "                self.annotations.append(annotation)\n",
+    "                    self.annotations.append(annotation)\n",
     "      \n",
     "        self.transforms = transforms        \n",
     "\n",