Index: openacs-4/packages/acs-messaging/tcl/acs-messaging-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-messaging/tcl/acs-messaging-procs.tcl,v
diff -u -N -r1.7 -r1.7.6.1
--- openacs-4/packages/acs-messaging/tcl/acs-messaging-procs.tcl	12 Jul 2009 01:08:30 -0000	1.7
+++ openacs-4/packages/acs-messaging/tcl/acs-messaging-procs.tcl	2 Oct 2013 10:16:05 -0000	1.7.6.1
@@ -133,7 +133,7 @@
 } {
     Returns a best guess of the timezone offset for the machine.
 } {
-    return [format "%+05d" [expr ([lindex [ns_localtime] 2] - [lindex [ns_gmtime] 2]) * 100]]
+    return [format "%+05d" [expr {([lindex [ns_localtime] 2] - [lindex [ns_gmtime] 2]) * 100]}]
 }
 
 ad_proc -private acs_messaging_process_queue {