Index: openacs-4/packages/acs-mail-lite/tcl/acs-mail-lite-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-mail-lite/tcl/acs-mail-lite-procs.tcl,v
diff -u -N -r1.92.2.9 -r1.92.2.10
--- openacs-4/packages/acs-mail-lite/tcl/acs-mail-lite-procs.tcl	21 Apr 2017 16:11:28 -0000	1.92.2.9
+++ openacs-4/packages/acs-mail-lite/tcl/acs-mail-lite-procs.tcl	1 Dec 2017 18:23:30 -0000	1.92.2.10
@@ -513,7 +513,7 @@
 
         # Set the subject
         if { $subject ne "" } {
-            set encoded_subject [acs_mail_lite::utils::build_subject $subject]
+            set encoded_subject [acs_mail_lite::utils::build_subject -- $subject]
             mime::setheader $tokens Subject $encoded_subject
         }