diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8afffc..9901513 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,14 +56,8 @@ endif()
 #C++ is required from here on
 enable_language(CXX)
 
-# set up install directories. INCLUDE_INSTALL_DIR and LIB_INSTALL_DIR must not be absolute paths
-set(LIB_INSTALL_DIR_SUFFIX "" CACHE STRING "The directories where to install libraries to")
-set(LIB_INSTALL_DIR lib${LIB_INSTALL_DIR_SUFFIX} )
 set(CMAKECONFIG_INSTALL_DIR ${LIB_INSTALL_DIR}/cmake/Libkolabxml )
 
-# Use a versioned install directory for the headers so multiple versions can be installed in parallel
-set(INCLUDE_INSTALL_DIR include/kolab )
-
 configure_file(libkolabxml-version.h.cmake "${CMAKE_BINARY_DIR}/libkolabxml-version.h" @ONLY)
 
 set(Boost_USE_MULTITHREADED ON)