diff --git a/lego/sys/log/logger.go b/lego/sys/log/logger.go
index b25c1e64c..5b5a98eb0 100644
--- a/lego/sys/log/logger.go
+++ b/lego/sys/log/logger.go
@@ -194,6 +194,7 @@ func (this *Logger) check(level Loglevel, msg string, args ...Field) (entry *Ent
 		entry.Caller.File = frame.File
 		entry.Caller.Line = frame.Line
 		entry.Caller.Function = frame.Function
+		entry.Caller.Stack = ""
 	}
 	if addStack {
 		buffer := pools.BufferPoolGet()