diff --git a/internal/identity/manager/data.go b/internal/identity/manager/data.go
index 35e4c2bc7..6aeccbf5d 100644
--- a/internal/identity/manager/data.go
+++ b/internal/identity/manager/data.go
@@ -48,6 +48,8 @@ func nextSessionRefresh(
 	return tm
 }
 
+// a multiUnmarshaler is used as the target of the json Unmarshal function to
+// unmarshal a single JSON value into multiple destinations.
 type multiUnmarshaler []any
 
 func newMultiUnmarshaler(args ...any) *multiUnmarshaler {