diff --git a/src/meshio/_mesh.py b/src/meshio/_mesh.py
index 741831d9..85be71be 100644
--- a/src/meshio/_mesh.py
+++ b/src/meshio/_mesh.py
@@ -13,6 +13,7 @@
     "triangle": 2,
     "quad": 2,
     "tetra": 3,
+    "tetra4": 3,
     "hexahedron": 3,
     "wedge": 3,
     "pyramid": 3,