diff --git a/workflow/engine/classes/class.xmlfield_InputPM.php b/workflow/engine/classes/class.xmlfield_InputPM.php
index a0c79db58..c7b1d8592 100644
--- a/workflow/engine/classes/class.xmlfield_InputPM.php
+++ b/workflow/engine/classes/class.xmlfield_InputPM.php
@@ -382,8 +382,11 @@ function getDynaformsVars ($sProcessUID, $typeVars = 'all', $bIncMulSelFields =
         foreach ($aAux as $sName => $sValue) {
             $aFields[] = array ('sName' => $sName,'sType' => 'system','sLabel' => G::LoadTranslation('ID_TINY_SYSTEM_VARIABLES'));
         }
-        //we're adding the ping variable to the system list
+        //we're adding the pin variable to the system list
         $aFields[] = array ('sName' => 'PIN','sType' => 'system','sLabel' => G::LoadTranslation('ID_TINY_SYSTEM_VARIABLES'));
+        
+        //we're adding the app_number variable to the system list
+        $aFields[] = array('sName' => 'APP_NUMBER', 'sType' => 'system', 'sLabel' => G::LoadTranslation('ID_TINY_SYSTEM_VARIABLE'), 'sUid' => '');
     }
 
     $aInvalidTypes = array("title", "subtitle", "file", "button", "reset", "submit", "javascript", "pmconnection");
diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Process.php b/workflow/engine/src/ProcessMaker/BusinessModel/Process.php
index fc8ff59e3..7c3fa36fe 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Process.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Process.php
@@ -1667,8 +1667,11 @@ class Process
             foreach ($aAux as $sName => $sValue) {
                 $aFields[] = array ('sName' => $sName,'sType' => 'system','sLabel' => G::LoadTranslation('ID_TINY_SYSTEM_VARIABLE'), 'sUid' => '');
             }
-            //we're adding the ping variable to the system list
+            //we're adding the pin variable to the system list
             $aFields[] = array ('sName' => 'PIN','sType' => 'system','sLabel' => G::LoadTranslation('ID_TINY_SYSTEM_VARIABLE'), 'sUid' => '');
+            
+            //we're adding the app_number variable to the system list
+            $aFields[] = array('sName' => 'APP_NUMBER', 'sType' => 'system', 'sLabel' => G::LoadTranslation('ID_TINY_SYSTEM_VARIABLE'), 'sUid' => '');
         }
 
         $aInvalidTypes = array("title", "subtitle", "file", "button", "reset", "submit", "javascript");