diff --git a/matlab/IMAS/ids2database.m b/matlab/IMAS/ids2database.m
index deecfcb2a8598bc612982f51f18867f542a322ac..b98deef01c720116b3a1078e306ab0d37936a956 100644
--- a/matlab/IMAS/ids2database.m
+++ b/matlab/IMAS/ids2database.m
@@ -7,7 +7,7 @@ function [ids_put_status] = ids2database(shot,run,occurence,ids2put,tree_user,tr
 % tree_name: getenv('USER') by default, can be 'public'
 % tree_tokamak: 'tcv' by default, typically tcv, TCV, ITER, etc (case will appear in folder name)
 % tree_majorversion: '3' by default
-% imas_backend: 'MDSplus' or 'HDF5' or 12 or 13
+% imas_backend: string, numeric input for imas_backend data type. Can be 'MDSplus' (== 12) or 'HDF5' (== 13)
 %
 % varargin{1}: tbd
 %