diff --git a/designate/storage/sqlalchemy/alembic.ini b/designate/storage/sqlalchemy/alembic.ini
index 34be5f67a..338fad740 100644
--- a/designate/storage/sqlalchemy/alembic.ini
+++ b/designate/storage/sqlalchemy/alembic.ini
@@ -14,6 +14,10 @@ script_location = %(here)s/alembic
 # defaults to the current working directory.
 prepend_sys_path = .
 
+# indicates what character is used to split lists of file paths, including
+# version_locations and prepend_sys_path
+path_separator = os
+
 # timezone to use when rendering the date within the migration file
 # as well as the filename.
 # If specified, requires the python-dateutil library that can be