diff --git a/logger.go b/logger.go
index c46ae10..34e62ee 100644
--- a/logger.go
+++ b/logger.go
@@ -50,13 +50,13 @@ func (l LevelLogger) DebugPrintf(format string, a ...interface{}) {
 
 func (l LevelLogger) DebugPrint(a ...interface{}) {
 	if l.debug {
-		l.Print(append([]interface{}{"[DEBUG] "}, a)...)
+		l.Print(append([]interface{}{"[DEBUG] "}, a...)...)
 	}
 }
 
 func (l LevelLogger) DebugPrintln(a ...interface{}) {
 	if l.debug {
-		l.Println(append([]interface{}{"[DEBUG] "}, a)...)
+		l.Println(append([]interface{}{"[DEBUG] "}, a...)...)
 	}
 }
 
@@ -68,12 +68,12 @@ func (l LevelLogger) TracePrintf(format string, a ...interface{}) {
 
 func (l LevelLogger) TracePrint(a ...interface{}) {
 	if l.trace {
-		l.Print(append([]interface{}{"[TRACE] "}, a)...)
+		l.Print(append([]interface{}{"[TRACE] "}, a...)...)
 	}
 }
 
 func (l LevelLogger) TracePrintln(a ...interface{}) {
 	if l.trace {
-		l.Println(append([]interface{}{"[TRACE] "}, a)...)
+		l.Println(append([]interface{}{"[TRACE] "}, a...)...)
 	}
 }