diff --git a/matlab/TCV/gdat_tcv.m b/matlab/TCV/gdat_tcv.m
index 2caee8958739117456197378dbec07eb883a1727..a6118f64c65737d25943d7f4ca4bed810cb82bea 100644
--- a/matlab/TCV/gdat_tcv.m
+++ b/matlab/TCV/gdat_tcv.m
@@ -3317,7 +3317,7 @@ elseif strcmp(mapping_for_tcv.method,'switchcase')
     end
     % sxr from dmpx by default or xtomo if 'camera','xtomo' is provided
     if ~isfield(gdat_data.gdat_params,'source') || isempty(gdat_data.gdat_params.source)
-      if shot < 70511
+      if shot < 70144
         gdat_data.gdat_params.source = 'mpx';
       else
         gdat_data.gdat_params.source = 'radcam';