diff --git a/notebooks/institutions/oa-percentage.ipynb b/notebooks/institutions/oa-percentage.ipynb
index 3cc3e2e..b9119af 100644
--- a/notebooks/institutions/oa-percentage.ipynb
+++ b/notebooks/institutions/oa-percentage.ipynb
@@ -208,7 +208,7 @@
     "    for index, group in enumerate(work_groups):\n",
     "        print(f\"--> Group {index+1} includes all works where `is_oa` is {group['key']} and has a count of {group['count']} publications.\")\n",
     "\n",
-    "        if group['key']==\"true\":\n",
+    "        if group['key_display_name']==\"true\":\n",
     "            open_works_count += group['count']\n",
     "        else: \n",
     "            closed_works_count += group['count']\n",