diff --git a/gnu-system.am b/gnu-system.am
index 3cc946a3ca..c18db0dc56 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -335,6 +335,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/slim-session.patch			\
   gnu/packages/patches/slim-config.patch			\
   gnu/packages/patches/slim-sigusr1.patch			\
+  gnu/packages/patches/soprano-find-clucene.patch		\
   gnu/packages/patches/source-highlight-regexrange-test.patch	\
   gnu/packages/patches/sqlite-large-page-size-fix.patch		\
   gnu/packages/patches/tcsh-fix-autotest.patch			\
diff --git a/gnu/packages/patches/soprano-find-clucene.patch b/gnu/packages/patches/soprano-find-clucene.patch
new file mode 100644
index 0000000000..cc2707853a
--- /dev/null
+++ b/gnu/packages/patches/soprano-find-clucene.patch
@@ -0,0 +1,15 @@
+Search for clucene include file in the clucene include directory.
+
+diff -u -r soprano-2.9.4.orig/cmake/modules/FindCLucene.cmake soprano-2.9.4/cmake/modules/FindCLucene.cmake
+--- soprano-2.9.4.orig/cmake/modules/FindCLucene.cmake	2013-10-09 19:22:28.000000000 +0200
++++ soprano-2.9.4/cmake/modules/FindCLucene.cmake	2014-04-28 20:08:11.000000000 +0200
+@@ -77,7 +77,8 @@
+ 
+ get_filename_component(TRIAL_LIBRARY_DIR ${CLUCENE_LIBRARY} PATH)
+ find_path(CLUCENE_LIBRARY_DIR
+-  NAMES CLucene/clucene-config.h PATHS ${TRIAL_LIBRARY_DIR} ${TRIAL_LIBRARY_PATHS} ${TRIAL_INCLUDE_PATHS} NO_DEFAULT_PATH)
++  NAMES CLucene/clucene-config.h PATHS ${TRIAL_LIBRARY_DIR} ${TRIAL_LIBRARY_PATHS} ${TRIAL_INCLUDE_PATHS} ${CLUCENE_INCLUDE_DIR} NO_DEFAULT_PATH)
++message (STATUS "XXX ${CLUCENE_LIBRARY_DIR}")
+ if(CLUCENE_LIBRARY_DIR)
+   message(STATUS "Found CLucene library dir: ${CLUCENE_LIBRARY_DIR}")
+   file(READ ${CLUCENE_LIBRARY_DIR}/CLucene/clucene-config.h CLCONTENT)
diff --git a/gnu/packages/rdf.scm b/gnu/packages/rdf.scm
index b297b5209b..368245bbaa 100644
--- a/gnu/packages/rdf.scm
+++ b/gnu/packages/rdf.scm
@@ -106,15 +106,15 @@ Java Lucene text search engine API to C++.")
                                 "soprano-" version ".tar.bz2"))
              (sha256
               (base32
-               "1rg0x7yg0a1cbnxz7kqk52580wla8jbnj4d4r3j7l7g7ajyny1k4"))))
+               "1rg0x7yg0a1cbnxz7kqk52580wla8jbnj4d4r3j7l7g7ajyny1k4"))
+             (patches (list (search-patch "soprano-find-clucene.patch")))))
     (build-system cmake-build-system)
     ;; FIXME: Add optional dependencies: Redland, odbci.
     (native-inputs
      `(("doxygen" ,doxygen)
        ("pkg-config" ,pkg-config)))
     (inputs
-     `(("clucene" ,clucene) ; is not yet "fully found", but sufficiently
-                            ; so to allow for compilation...
+     `(("clucene" ,clucene)
        ("qt" ,qt-4)
        ("raptor2" ,raptor2)))
     (home-page "http://soprano.sourceforge.net/")