diff --git a/decor/decorator.go b/decor/decorator.go
index 2f941d7..301bbff 100644
--- a/decor/decorator.go
+++ b/decor/decorator.go
@@ -67,7 +67,7 @@
 	Sync() (chan int, bool)
 }
 
-// ConfigSetter interface
+// ConfigSetter interface.
 type ConfigSetter interface {
 	SetConfig(config WC) (old WC)
 }