diff --git a/clucene.spec b/clucene.spec
index 6fa003f..9fc68eb 100644
--- a/clucene.spec
+++ b/clucene.spec
@@ -11,6 +11,7 @@ BuildRequires:	gawk cmake zlib-devel boost-devel
 
 ## upstreamable patches
 # include LUCENE_SYS_INCLUDES in pkgconfig --cflags output
+# https://bugzilla.redhat.com/748196
 Patch50: clucene-core-2.3.3.4-pkgconfig_sys_includes.patch
 
 %description
@@ -92,7 +93,7 @@ rm -rf %{buildroot}
 
 %changelog
 * Sun Oct 23 2011 Rex Dieter <rdieter@fedoraproject.org> 2.3.3.4-3
-- include LUCENE_SYS_INCLUDES in pkgconfig --cflags output 
+- include LUCENE_SYS_INCLUDES in pkgconfig --cflags output (#748196)
 
 * Wed Jun 08 2011 Rex Dieter <rdieter@fedoraproject.org> 2.3.3.4-2
 - cleanup cmake usage