diff --git a/src/core/core.go b/src/core/core.go
index b096d1d7..bbf5b63f 100644
--- a/src/core/core.go
+++ b/src/core/core.go
@@ -210,4 +210,5 @@ type Logger interface {
 	Errorln(...interface{})
 	Debugf(string, ...interface{})
 	Debugln(...interface{})
+	Traceln(...interface{})
 }