diff --git a/packages/CLPBN/CMakeLists.txt b/packages/CLPBN/CMakeLists.txt
index cf5941dbb..afac66d1a 100644
--- a/packages/CLPBN/CMakeLists.txt
+++ b/packages/CLPBN/CMakeLists.txt
@@ -89,6 +89,8 @@ set(
   ex/learning/train.yap
   )
 
+add_subDIRECTORY (horus)
+
 install(FILES
   ${CLPBN_TOP}
   DESTINATION ${libpl}
diff --git a/packages/CLPBN/horus/CMakeLists.txt b/packages/CLPBN/horus/CMakeLists.txt
index 1555ad986..2741ee32f 100644
--- a/packages/CLPBN/horus/CMakeLists.txt
+++ b/packages/CLPBN/horus/CMakeLists.txt
@@ -54,7 +54,7 @@
     ADD_LIBRARY(horus SHARED ${HORUS_SOURCES} )
   endif()
 
-  #set_property(TARGET horus PROPERTY CXX_STANDARD 11)
+#set_property(TARGET horus PROPERTY CXX_STANDARD 11)
   #set_property(TARGET horus PROPERTY CXX_STANDARD_REQUIRED ON)
 
   set_target_properties (horus PROPERTIES PREFIX "" CXX_STANDARD 11 CXX_STANDARD_REQUIRED ON)