diff --git a/slides/gen_index.sh b/slides/gen_index.sh
index e8180fd7c498c3fa0beebd05b717b2e97055f849..e396abfb4e9a7572fa29f8e38534bd7e4a4d2822 100755
--- a/slides/gen_index.sh
+++ b/slides/gen_index.sh
@@ -2,7 +2,8 @@
 
 OIFS=$IFS
 NUM_LINE=2
-PREFIX=cours/algo/slides/
+PREFIX=""
+# PREFIX=cours/algo/slides/
 
 classes=()
 for i in *.md; do