Index: openacs-4/packages/acs-tcl/tcl/form-processing-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/form-processing-procs.tcl,v
diff -u -r1.79 -r1.80
--- openacs-4/packages/acs-tcl/tcl/form-processing-procs.tcl	5 Feb 2019 15:09:15 -0000	1.79
+++ openacs-4/packages/acs-tcl/tcl/form-processing-procs.tcl	5 Feb 2019 15:18:21 -0000	1.80
@@ -1077,7 +1077,7 @@
 
         # Update the clicked button if it does not already exist
         uplevel #$level {
-            if {[info exists __submit_button_name && $__submit_button_name ne ""]} {
+            if {[info exists __submit_button_name] && $__submit_button_name ne ""} {
                 set $__submit_button_name $__submit_button_value
             }
         }