diff --git a/config.go b/config.go
index 475b428bf..7daaae7d6 100644
--- a/config.go
+++ b/config.go
@@ -198,7 +198,7 @@ func init() {
 				}
 				return loadProtobufConfig(data)
 			default:
-				return nil, newError("unknow type")
+				return nil, newError("unknown type")
 			}
 		},
 	}))