diff --git a/configuration.md b/configuration.md
index 1b498781..c4ce63a1 100644
--- a/configuration.md
+++ b/configuration.md
@@ -220,6 +220,12 @@ Available backends:
 
 Default: `multifilesystem`
 
+### filesystem_folder
+
+Folder for storing local collections, created if not present.
+
+Default: `/var/lib/radicale/collections`
+
 ### filesystem_fsync
 Sync all changes to disk during requests. (This can impair performance.)
 Disabling it increases the risk of data loss, when the system crashes or