Index: libcfa/src/containers/stackLockFree.hfa
===================================================================
--- libcfa/src/containers/stackLockFree.hfa	(revision d6d1f80435878c773e2c58c98dede3a28b9ea068)
+++ libcfa/src/containers/stackLockFree.hfa	(revision 04b5cef29b60d0ea2bc49962adba72c424a3e55e)
@@ -1,9 +1,9 @@
-// 
+//
 // Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo
 // The contents of this file are covered under the licence agreement in the
 // file "LICENCE" distributed with Cforall.
 //
-// stackLockFree.hfa -- 
-// 
+// stackLockFree.hfa --
+//
 // Author           : Peter A. Buhr
 // Created On       : Wed May 13 20:58:58 2020
@@ -11,5 +11,5 @@
 // Last Modified On : Mon May 18 13:30:08 2020
 // Update Count     : 55
-// 
+//
 
 #pragma once
@@ -20,5 +20,5 @@
 union Link {
 	struct {									// 32/64-bit x 2
-		T * top;								// pointer to stack top
+		T * volatile top;								// pointer to stack top
 		uintptr_t count;						// count each push
 	};