diff --git a/presentations/20min-violation-intro/Makefile b/presentations/20min-violation-intro/Makefile
index 6f9beb2..87309f2 100644
--- a/presentations/20min-violation-intro/Makefile
+++ b/presentations/20min-violation-intro/Makefile
@@ -4,7 +4,7 @@
 # an environment variable before you type make.
 
 ifndef PRESENTATION_BASE
-PRESENTATION_BASE=specific-sections
+PRESENTATION_BASE=violation-intro
 endif 
 
 DO_INCREMENTAL_POINTS = -i -s