diff --git a/.gitignore b/.gitignore
index 2daba2284e8ef42af5e37649a07c4adc61bc1f08..eb3b68338ae632f3bb23af50769a689fe15ce887 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 # # put this line in comment when presentation is finished
 # # (no need to clutter repo history with intermediate slides PDFs)
-# **/presentation.pdf
+**/presentation.pdf
 
 # emacs gitignore (_region_: auctex preview files)
 *.el