diff --git a/python/BioSimSpace/FreeEnergy/_utils.py b/python/BioSimSpace/FreeEnergy/_utils.py
index c4c3a61b7..540be2bf5 100644
--- a/python/BioSimSpace/FreeEnergy/_utils.py
+++ b/python/BioSimSpace/FreeEnergy/_utils.py
@@ -38,4 +38,4 @@ def engines():
     engines : [str]
         The list of supported engines.
     """
-    return ["SOMD", "GROMACS"]
+    return ["AMBER", "SOMD", "GROMACS"]