diff --git a/intermediate/indexing/advanced-indexing.ipynb b/intermediate/indexing/advanced-indexing.ipynb
index c272f282..c83a2bf7 100644
--- a/intermediate/indexing/advanced-indexing.ipynb
+++ b/intermediate/indexing/advanced-indexing.ipynb
@@ -267,7 +267,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "da_air.sel(lat=obs_lats, lon=obs_lats, method=\"nearest\")  # -- orthogonal indexing"
+    "da_air.sel(lat=obs_lats, lon=obs_lons, method=\"nearest\")  # -- orthogonal indexing"
    ]
   },
   {