Wrong statistics information of histogram with Draw("same")


I need draw two histograms on one canvas,
and the second histogram, which is a merged file include two root files, is drawn with the command Draw(“same”).
Everything is fine except that the second histogram’s statistics information, which only shows the first original file statistics information indeed of the summed information.

Does any body know how to solve the problem?
Many thanks for the help in advance.

Best regards,

Have you tried the option SAMES ?