diff --git a/latex/thesis.cls b/latex/thesis.cls
index 4e246f3..5e94095 100644
--- a/latex/thesis.cls
+++ b/latex/thesis.cls
@@ -141,6 +141,7 @@
     \renewcommand{\headrulewidth}{0pt}
     \fancyfoot[C]{\thepage}
 }
+% Some LaTeX commands, like \chapter and \chapter*, use the \thispagestyle command to automatically switch to the plain page style, thus ignoring the page style currently in effect. To customize even such pages you must redefine the plain pagestyle. And current 'plain' style by default has correct format. This following command only used for non-chapter-page
 \fancypagestyle{fancyplain}{%
     \fancyhf{}
     \setlength{\headheight}{15pt} % to avoid fancyhdr warning