diff --git a/snmptraps/centos/conf/usr/sbin/zabbix_trap_handler.sh b/snmptraps/centos/conf/usr/sbin/zabbix_trap_handler.sh
index 96b599409..051c6f02d 100644
--- a/snmptraps/centos/conf/usr/sbin/zabbix_trap_handler.sh
+++ b/snmptraps/centos/conf/usr/sbin/zabbix_trap_handler.sh
@@ -4,7 +4,7 @@ ZABBIX_TRAPS_FILE="/var/lib/zabbix/snmptraps/snmptraps.log"
 
 ZBX_SNMP_TRAP_DATE_FORMAT=${ZBX_SNMP_TRAP_DATE_FORMAT:-"+%Y%m%d.%H%M%S"}
 
-ZBX_SNMP_TRAP_FORMAT=${ZBX_SNMP_TRAP_FORMAT:" "}
+ZBX_SNMP_TRAP_FORMAT=${ZBX_SNMP_TRAP_FORMAT:-" "}
 
 date=$(date "$ZBX_SNMP_TRAP_DATE_FORMAT")
 
diff --git a/snmptraps/ubuntu/conf/usr/sbin/zabbix_trap_handler.sh b/snmptraps/ubuntu/conf/usr/sbin/zabbix_trap_handler.sh
index 96b599409..051c6f02d 100644
--- a/snmptraps/ubuntu/conf/usr/sbin/zabbix_trap_handler.sh
+++ b/snmptraps/ubuntu/conf/usr/sbin/zabbix_trap_handler.sh
@@ -4,7 +4,7 @@ ZABBIX_TRAPS_FILE="/var/lib/zabbix/snmptraps/snmptraps.log"
 
 ZBX_SNMP_TRAP_DATE_FORMAT=${ZBX_SNMP_TRAP_DATE_FORMAT:-"+%Y%m%d.%H%M%S"}
 
-ZBX_SNMP_TRAP_FORMAT=${ZBX_SNMP_TRAP_FORMAT:" "}
+ZBX_SNMP_TRAP_FORMAT=${ZBX_SNMP_TRAP_FORMAT:-" "}
 
 date=$(date "$ZBX_SNMP_TRAP_DATE_FORMAT")