diff --git a/plugins/inputs/snmp_trap/snmp_trap.go b/plugins/inputs/snmp_trap/snmp_trap.go
index 03f6a3a29..a80276264 100644
--- a/plugins/inputs/snmp_trap/snmp_trap.go
+++ b/plugins/inputs/snmp_trap/snmp_trap.go
@@ -171,7 +171,7 @@ func makeTrapHandler(s *SnmpTrap) handler {
 			// translate a v1 trap to v2.
 			var trapOid string
 
-			if packet.GenericTrap > 0 && packet.GenericTrap < 6 {
+			if packet.GenericTrap >= 0 && packet.GenericTrap < 6 {
 				trapOid = "1.3.6.1.6.3.1.1.5." + strconv.Itoa(packet.GenericTrap+1)
 			} else if packet.GenericTrap == 6 {
 				trapOid = packet.Enterprise + ".0." + strconv.Itoa(packet.SpecificTrap)