diff --git a/docs/book/src/reference/glossary.md b/docs/book/src/reference/glossary.md
index 7c21c9211b6c..48c2b1c5038e 100644
--- a/docs/book/src/reference/glossary.md
+++ b/docs/book/src/reference/glossary.md
@@ -87,7 +87,7 @@ Cluster API Provider Kubevirt
 ### CAPO
 Cluster API Provider OpenStack
 
-## CAPOSC
+### CAPOSC
 Cluster API Provider Outscale
 
 ### CAPOCI