diff --git a/software/trackStackFlow.m b/software/trackStackFlow.m
index 22480db..94b4932 100644
--- a/software/trackStackFlow.m
+++ b/software/trackStackFlow.m
@@ -192,7 +192,7 @@
 
 poolobj = gcp('nocreate'); % If no pool, do not create new one.
 if isempty(poolobj)
-    poolsize = feature('numCores');
+    poolsize = str2double(getenv('NUMBER_OF_PROCESSORS')) - 1;          % Modified by Waddah Moghram on 12/10/2018 and is better to get all cores when hyperthreading is enabled
 else
     poolsize = poolobj.NumWorkers;
 end