diff --git a/hunspell-en.spec b/hunspell-en.spec
index 302df9c..2654a46 100644
--- a/hunspell-en.spec
+++ b/hunspell-en.spec
@@ -19,7 +19,7 @@ Patch4: hunspell-en-allow-non-typographical.marks.patch
 #See https://sourceforge.net/tracker/?func=detail&aid=3012183&group_id=10079&atid=1014602
 #See https://bugzilla.redhat.com/show_bug.cgi?id=619577 add SI and IEC prefixes
 Patch5: hunspell-en-SI_and_IEC.patch
-#obscure Calender hides misspelling of Calendar
+#See https://sourceforge.net/tracker/?func=detail&aid=3175662&group_id=10079&atid=1014602 obscure Calender hides misspelling of Calendar
 Patch6: hunspell-en-calender.patch
 Group: Applications/Text
 URL: http://wordlist.sourceforge.net/