diff --git a/toSubAps.m b/toSubAps.m
index 0debde0224bec7f283280501ab74bf81ca6ff4e3..c5726a0970448d156946f4195b3d0148568fd845 100644
--- a/toSubAps.m
+++ b/toSubAps.m
@@ -4,6 +4,7 @@ function  toSubAps(data,Dir,varargin)
 
 sz = size(data);
 sz = sz(4:end);
+sz(end+1:2) = 1;
 mask = true(sz);
 p = inputParser();
 p.addParameter('name' , ''   , @ischar);