diff --git a/external/source/meterpreter/source/common/list.c b/external/source/meterpreter/source/common/list.c
index ba780b8c9f..20f73b2a1f 100644
--- a/external/source/meterpreter/source/common/list.c
+++ b/external/source/meterpreter/source/common/list.c
@@ -2,9 +2,9 @@
 
 /*
  * An implementation of a simple thread safe double linked list structure. Can be used as either
- * a stack (via pop/push) or an array (via get/add/insert/remove). If performing a group of
- * actions on a list based on results from list actions, acquire the list lock before the group
- * of actions and release lock when done.
+ * a stack (via pop/push), a queue (via push/shift) or an array (via get/add/insert/remove). If
+ * performing a group of actions on a list based on results from list actions, acquire the list 
+ * lock before the group of actions and release lock when done.
  */
 
 /*
@@ -308,5 +308,29 @@ LPVOID list_pop( LIST * list )
 
 	lock_release( list->lock );
 
+	return data;
+}
+
+/*
+ * Pop a data value off the start of the list.
+ */
+LPVOID list_shift( LIST * list )
+{
+	LPVOID data = NULL;
+
+	if( list == NULL )
+		return NULL;
+
+	lock_acquire( list->lock );
+
+	if( list->start != NULL )
+	{
+		data = list->start->data;
+
+		list_remove_node( list, list->start );
+	}
+
+	lock_release( list->lock );
+
 	return data;
 }
\ No newline at end of file
diff --git a/external/source/meterpreter/source/common/list.h b/external/source/meterpreter/source/common/list.h
index 0c7866ad0c..fbb228ea5e 100644
--- a/external/source/meterpreter/source/common/list.h
+++ b/external/source/meterpreter/source/common/list.h
@@ -38,6 +38,8 @@ BOOL list_push( LIST * list, LPVOID data );
 
 LPVOID list_pop( LIST * list );
 
+LPVOID list_shift( LIST * list );
+
 /*****************************************************************************************/
 
 #endif
\ No newline at end of file