diff --git a/config_templates/agent/zabbix_agentd_active_checks.conf b/config_templates/agent/zabbix_agentd_active_checks.conf
index 939fbc4fa..de71dd4b2 100644
--- a/config_templates/agent/zabbix_agentd_active_checks.conf
+++ b/config_templates/agent/zabbix_agentd_active_checks.conf
@@ -154,4 +154,4 @@ MaxLinesPerSecond=${ZBX_MAXLINESPERSECOND}
 # Default: 60
 # HeartbeatFrequency=
 
-HeartbeatFrequency=${ZBX_HEARTBEATFREQUENCY}
+HeartbeatFrequency=${ZBX_HEARTBEAT_FREQUENCY}
diff --git a/config_templates/agent2/zabbix_agent2_active_checks.conf b/config_templates/agent2/zabbix_agent2_active_checks.conf
index bac919bd2..8a86aa463 100644
--- a/config_templates/agent2/zabbix_agent2_active_checks.conf
+++ b/config_templates/agent2/zabbix_agent2_active_checks.conf
@@ -186,7 +186,7 @@ Plugins.Log.MaxLinesPerSecond=${ZBX_MAXLINESPERSECOND}
 # Default: 60
 # HeartbeatFrequency=
 
-HeartbeatFrequency=${ZBX_HEARTBEATFREQUENCY}
+HeartbeatFrequency=${ZBX_HEARTBEAT_FREQUENCY}
 
 ### Option: ForceActiveChecksOnStart
 #	Perform active checks immediately after restart for first received configuration.
diff --git a/env_vars/.env_agent b/env_vars/.env_agent
index c6f558ff4..e1f8e18d4 100644
--- a/env_vars/.env_agent
+++ b/env_vars/.env_agent
@@ -23,7 +23,6 @@
 # ZBX_BUFFERSEND=5
 # ZBX_BUFFERSIZE=100
 # ZBX_MAXLINESPERSECOND=20
-# ZBX_HEARTBEATFREQUENCY=60
 # ZBX_ALIAS=""
 # ZBX_TIMEOUT=3
 # ZBX_UNSAFEUSERPARAMETERS=0