diff --git a/.gitignore b/.gitignore
index 75edcb5263d9fd60b44b1c26a0c9bf2a7f760b76..71e12b2ed675befc93827a4fb08b76ffc2060505 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