1 files changed, 2 insertions, 0 deletions
diff --git a/process_bug.cgi b/process_bug.cgi
index afed412a3..f061d4455 100755
--- a/process_bug.cgi
+++ b/process_bug.cgi
@@ -930,6 +930,8 @@ foreach my $id (@idlist) {
     my %oldhash;
     my $i = 0;
     foreach my $col (@::log_columns) {
+        # Consider NULL db entries to be equivalent to the empty string
+        $oldvalues[$i] ||= '';
         $oldhash{$col} = $oldvalues[$i];
         if (exists $::FORM{$col}) {
             CheckCanChangeField($col, $id, $oldvalues[$i], $::FORM{$col});