diff --git a/matlab/pm3.m b/matlab/pm3.m
index 3d93b04c1bcb87d22e09798a28dec05795d951a1..94d38221beb914ade80821dbf21e13b71ea0526d 100644
--- a/matlab/pm3.m
+++ b/matlab/pm3.m
@@ -264,7 +264,7 @@ else
         end
         if filter_step_ahead_indicator
             for K_step = 1:length(options_.filter_step_ahead)
-                name4=['Filtered_Variables_',num2str(K_step),'_step_ahead'];
+                name4=['Filtered_Variables_',num2str(options_.filter_step_ahead(K_step)),'_step_ahead'];
                 oo_.(name4).Mean.(name) = squeeze(Mean_filter_step_ahead(K_step,i,:));
                 oo_.(name4).Median.(name) = squeeze(Median_filter_step_ahead(K_step,i,:));
                 oo_.(name4).Var.(name) = squeeze(Var_filter_step_ahead(K_step,i,:));