diff --git a/docs/user-guide/grid-formats.rst b/docs/user-guide/grid-formats.rst
index 234b6dae1..b4d729a2c 100644
--- a/docs/user-guide/grid-formats.rst
+++ b/docs/user-guide/grid-formats.rst
@@ -328,7 +328,7 @@ Connectivity
        <td class="no-cell">No</td>
        <td class="no-cell">No</td>
        <td class="no-cell">No</td>
-       <td class="no-cell">No</td>
+       <td class="yes-cell">Yes</td>
      </tr>
      <tr>
        <td>edge_edge</td>
diff --git a/uxarray/io/_icon.py b/uxarray/io/_icon.py
index aaba56995..01ed891f2 100644
--- a/uxarray/io/_icon.py
+++ b/uxarray/io/_icon.py
@@ -75,6 +75,13 @@ def _primal_to_ugrid(in_ds, out_ds):
         attrs=ugrid.EDGE_FACE_CONNECTIVITY_ATTRS,
     )
 
+    edge_node_connectivity = in_ds["edge_vertices"].T - 1
+    out_ds["edge_node_connectivity"] = xr.DataArray(
+        data=edge_node_connectivity,
+        dims=ugrid.EDGE_NODE_CONNECTIVITY_DIMS,
+        attrs=ugrid.EDGE_NODE_CONNECTIVITY_ATTRS,
+    )
+
     return out_ds, source_dims_dict