diff --git a/latex/thesis.cls b/latex/thesis.cls
index 85146c3..e37cc35 100644
--- a/latex/thesis.cls
+++ b/latex/thesis.cls
@@ -171,7 +171,7 @@
 
 \titleformat{\chapter}[display]
   {\normalsize\bfseries\centering}
-  {BAB~\Roman{chapter}} % << display format
+  {\MakeUppercase\chaptername~\Roman{chapter}} % << display format
   {1ex}
   {\MakeUppercase}
 \titleformat{\section}
@@ -184,7 +184,7 @@
 \setcounter{secnumdepth}{3}
 
 % Ensure chapter reference in TOC matches
-\renewcommand{\cftchappresnum}{BAB~}
+\renewcommand{\cftchappresnum}{\MakeUppercase\chaptername~}
 \renewcommand{\cftchapaftersnum}{\quad}