diff --git a/slides/gen_index.sh b/slides/gen_index.sh
index d56ff25e004845c0ca032738aa920bea9316b45e..8a59c9c2b14473b84606be18cac16d9591ae9d65 100755
--- a/slides/gen_index.sh
+++ b/slides/gen_index.sh
@@ -2,7 +2,7 @@
 
 OIFS=$IFS
 NUM_LINE=2
-PREFIX=algo/cours/slides/
+PREFIX=cours/algo/slides/
 
 classes=()
 for i in *.md; do