diff --git a/lib/worker.js b/lib/worker.js
index 788f4e0..cb0b499 100644
--- a/lib/worker.js
+++ b/lib/worker.js
@@ -513,7 +513,7 @@ function monitorNodes() {
             }
             rows.forEach(function (row) {
                     if (row.blockID < block.height - 3) {
-                        global.support.sendEmail(global.config.general.adminEmail, "Pool server behind in blocks", "The pool server: "+row.hostname+" with IP: "+row.ip+" is "+block.height - row.blockID+ " blocks behind");
+                        global.support.sendEmail(global.config.general.adminEmail, "Pool server behind in blocks", "The pool server: "+row.hostname+" with IP: "+row.ip+" is "+(block.height - row.blockID)+ " blocks behind");
                     }
                 }
             );