diff --git a/logger.go b/logger.go
index 05a3e85..54a901f 100644
--- a/logger.go
+++ b/logger.go
@@ -40,20 +40,20 @@ func (l *LevelLogger) EnableDebug(enable bool) {
 func (l LevelLogger) DebugPrintf(format string, a ...interface{}) {
 	if l.debug {
 		l.Print("[DEBUG] ")
-		l.Printf(format, a)
+		l.Printf(format, a...)
 	}
 }
 
 func (l LevelLogger) DebugPrint(a ...interface{}) {
 	if l.debug {
 		l.Print("[DEBUG] ")
-		l.Print(a)
+		l.Print(a...)
 	}
 }
 
 func (l LevelLogger) DebugPrintln(a ...interface{}) {
 	if l.debug {
 		l.Print("[DEBUG] ")
-		l.Println(a)
+		l.Println(a...)
 	}
 }