diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java
index b0b41fba4b..c7f0109271 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java
@@ -150,7 +150,7 @@ public class TbHttpClient {
     }
 
     private int getPoolMaxConnections() {
-        String poolMaxConnectionsEnv = System.getenv("TB_POOL_MAX_CONNECTIONS");
+        String poolMaxConnectionsEnv = System.getenv("TB_HTTP_POOL_MAX_CONNECTIONS");
 
         int poolMaxConnections;
         if (poolMaxConnectionsEnv != null) {