diff --git a/mozilla/tools/tinderbox/report-tree-status.pl b/mozilla/tools/tinderbox/report-tree-status.pl
index 666ae3896d9..f7ee1e71ade 100755
--- a/mozilla/tools/tinderbox/report-tree-status.pl
+++ b/mozilla/tools/tinderbox/report-tree-status.pl
@@ -102,6 +102,7 @@ sub is_tree_open {
       $sheriff_string =~ s/\\//g;
       $sheriff_string =~ s/#/[lb]/g;
       $sheriff_string =~ s/mailto://g;
+      $sheriff_string =~ s/[iI][rR][cC]://g;
       $sheriff_string =~ s/a href//g;
       $sheriff_string =~ s/[sS]heriff//g;
       $sheriff_string =~ s/[mM]onday//g;