diff --git a/main.go b/main.go
index 5ee3628..db9012c 100644
--- a/main.go
+++ b/main.go
@@ -17,7 +17,7 @@ func WaitForSignal() {
 }
 
 func main() {
-	fmt.Println("PNDPD Version 0.8 - Kioubit 2021")
+	fmt.Println("PNDPD Version 0.9 - Kioubit 2021")
 
 	if len(os.Args) <= 2 {
 		printUsage()
diff --git a/pndp/packet.go b/pndp/packet.go
index d83b802..cf14e4e 100644
--- a/pndp/packet.go
+++ b/pndp/packet.go
@@ -128,7 +128,7 @@ func checksumAddition(b []byte) uint32 {
 	var sum uint32 = 0
 	for i := 0; i < len(b); i++ {
 		if i%2 == 0 {
-			if len(b) == i-1 {
+			if len(b) <= i-1 {
 				sum += uint32(uint16(b[i])<<8 | uint16(0x0))
 			} else {
 				sum += uint32(uint16(b[i])<<8 | uint16(b[i+1]))