diff --git a/core/config.go b/core/config.go
index 1aa21f5f..1a5fa33f 100644
--- a/core/config.go
+++ b/core/config.go
@@ -24,7 +24,7 @@ type ConfigLoader func(input interface{}) (*Config, error)
 // ConfigBuilder is a builder to build core.Config from filenames and formats
 type ConfigBuilder func(files []string, formats []string) (*Config, error)
 
-// ConfigMerger merge multiple json configs into on config
+// ConfigsMerger merge multiple json configs into on config
 type ConfigsMerger func(files []string, formats []string) (string, error)
 
 var (