diff --git a/CanlabCore/@atlas/probability_maps_to_region_index.m b/CanlabCore/@atlas/probability_maps_to_region_index.m
index fd71a896..e090c364 100644
--- a/CanlabCore/@atlas/probability_maps_to_region_index.m
+++ b/CanlabCore/@atlas/probability_maps_to_region_index.m
@@ -31,7 +31,7 @@
     for f = 1:length(fnames)            
         if length(dat.labels) ~= n_regions
             for i = 1:length(dropped_ind)
-                warning('Dropping %s index %d', fnames{f}, dropped_ind);
+                warning('Dropping %s index %d', fnames{f}, dropped_ind(i));
             end
         end
         if length(dat.(fnames{f})) == n_regions