diff --git a/clucene-core-2.3.3.4-pkgconfig_sys_includes.patch b/clucene-core-2.3.3.4-pkgconfig_sys_includes.patch
new file mode 100644
index 0000000..e426cb4
--- /dev/null
+++ b/clucene-core-2.3.3.4-pkgconfig_sys_includes.patch
@@ -0,0 +1,10 @@
+diff -up clucene-core-2.3.3.4/src/core/libclucene-core.pc.cmake.sys_includes clucene-core-2.3.3.4/src/core/libclucene-core.pc.cmake
+--- clucene-core-2.3.3.4/src/core/libclucene-core.pc.cmake.sys_includes	2011-03-16 19:21:07.000000000 -0500
++++ clucene-core-2.3.3.4/src/core/libclucene-core.pc.cmake	2011-10-23 14:43:05.325553889 -0500
+@@ -7,5 +7,5 @@ Name: libclucene
+ Description: CLucene - a C++ search engine, ported from the popular Apache Lucene
+ Version: @CLUCENE_VERSION_MAJOR@.@CLUCENE_VERSION_MINOR@.@CLUCENE_VERSION_REVISION@.@CLUCENE_VERSION_PATCH@
+ Libs: -L${prefix}/@LIB_DESTINATION@/ -lclucene-core
+-Cflags: -I${prefix}/include -I${prefix}/include/CLucene/ext
++Cflags: -I${prefix}/include -I${prefix}/include/CLucene/ext -I@LUCENE_SYS_INCLUDES@
+ ~
diff --git a/clucene.spec b/clucene.spec
index 0c6a4fb..6fa003f 100644
--- a/clucene.spec
+++ b/clucene.spec
@@ -1,7 +1,7 @@
 Summary:	A C++ port of Lucene
 Name:		clucene
 Version:	2.3.3.4
-Release:	2%{?dist}
+Release:	3%{?dist}
 License:	LGPLv2+ or ASL 2.0
 Group:		Development/System
 URL:		http://www.sourceforge.net/projects/clucene
@@ -9,6 +9,10 @@ Source0:	http://downloads.sourceforge.net/clucene/clucene-core-2.3.3.4.tar.gz
 BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:	gawk cmake zlib-devel boost-devel
 
+## upstreamable patches
+# include LUCENE_SYS_INCLUDES in pkgconfig --cflags output
+Patch50: clucene-core-2.3.3.4-pkgconfig_sys_includes.patch
+
 %description
 CLucene is a C++ port of the popular Apache Lucene search engine
 (http://lucene.apache.org/java). 
@@ -37,6 +41,8 @@ developing with clucene
 %prep
 %setup -n %{name}-core-%{version}
 
+%patch50 -p1 -b .pkgconfig_sys_includes
+
 %build
 mkdir -p %{_target_platform}
 pushd %{_target_platform}
@@ -85,6 +91,9 @@ rm -rf %{buildroot}
 %{_libdir}/pkgconfig/libclucene-core.pc
 
 %changelog
+* Sun Oct 23 2011 Rex Dieter <rdieter@fedoraproject.org> 2.3.3.4-3
+- include LUCENE_SYS_INCLUDES in pkgconfig --cflags output 
+
 * Wed Jun 08 2011 Rex Dieter <rdieter@fedoraproject.org> 2.3.3.4-2
 - cleanup cmake usage
 - fix scriptlets