diff --git a/gtpv2/conn.go b/gtpv2/conn.go
index 44f358c2..8173c4a7 100644
--- a/gtpv2/conn.go
+++ b/gtpv2/conn.go
@@ -401,7 +401,7 @@ func (c *Conn) IncSequence() uint32 {
 	c.sequence++
 
 	// SequenceNumber is 3-octet long
-	if c.sequence > 0xffffff {
+	if c.sequence > 0x7fffff {
 		c.sequence = 0
 	}