diff --git a/patch.spec b/patch.spec
index ccd272f..53d1af8 100644
--- a/patch.spec
+++ b/patch.spec
@@ -24,6 +24,8 @@ Name:           patch
 License:        GPLv3+
 Group:          Productivity/Text/Utilities
 AutoReqProv:    on
+# See bnc#662957. The fix for CVE-2010-4651 breaks the way interdiff was
+# invoking patch, so interdiff had to be fixed too.
 Conflicts:      patchutils < 0.3.2
 Version:        2.6.1.116
 Release:        1