diff --git a/README.md b/README.md
index cbebdbb7..58f456d7 100644
--- a/README.md
+++ b/README.md
@@ -174,9 +174,9 @@ Optional attributes:
 - `macros`: A dictionary of macros. Defaults to an empty dictionary (no additional macros)
 - `inits` : A dictionary of initialisation values for PVs in this IOC. Defaults to an empty dictionary.
 - `custom_prefix` : A custom PV prefix for this IOC in case this is different from the IOC name (example: custom prefix `MOT` for IOC `GALIL_01`)
-- `emulator_protocol`: The lewis protocol to use. Defaults to `stream`, which is used by the majority of ISIS emulators.
-- `emulator_path`: Where to find the lewis emulator for this device. Defaults to `EPICS/support/DeviceEmulator/master`
-- `emulator_package`: The package containing this emulator. Equivalent to Lewis' `-k` switch. Defaults to `lewis_emulators`
+- `lewis_protocol`: The lewis protocol to use. Defaults to `stream`, which is used by the majority of ISIS emulators.
+- `lewis_additional_path`: Where to find the lewis emulator for this device. Defaults to `EPICS/support/DeviceEmulator/master`
+- `lewis_package`: The package containing this emulator. Equivalent to Lewis' `-k` switch. Defaults to `lewis_emulators`
 - `emulator_launcher_class`: Used if you want to launch an emulator that is not Lewis see [other emulators.](#other-emulators)
 - `pre_ioc_launch_hook`: Pass a callable to execute before this ioc is launched. Defaults to do nothing
 - `emulators`: Pass a list of `TestEmulatorData` objects to launch multiple lewis emulators.