diff --git a/slides.tex b/slides.tex
index 5e70f0c..02befb1 100644
--- a/slides.tex
+++ b/slides.tex
@@ -133,9 +133,9 @@ $ ./a.out
 Segmentation fault.
 
 |\pause|(gdb) backtrace
-#0   0x54625 in fct_b
-#1   0x54663 in fct_a
-#2   0x54674 in main
+#0   |0x54625| in fct_b
+#1   |\color{blue}0x54663| in fct_a
+#2   |\color{red}0x54674| in main
             \end{lstlisting}
             \pause{}
             \begin{center}