diff --git a/cmake/Modules/OpmInstall.cmake b/cmake/Modules/OpmInstall.cmake
index 59435249d..17f4a1179 100644
--- a/cmake/Modules/OpmInstall.cmake
+++ b/cmake/Modules/OpmInstall.cmake
@@ -8,6 +8,7 @@
 # _TARGET           CMake target which builds the library
 # _LIBRARY_TYPE     Static or shared library
 # _DEBUG            File containing debug symbols
+include (UseMultiArch)
 
 macro (opm_install opm)
   foreach (_hdr IN LISTS ${opm}_HEADERS)
@@ -48,8 +49,10 @@ macro (opm_install opm)
 	  DESTINATION ${_dbg_prefix}${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}${${opm}_VER_DIR}
 	  )
   endif (${opm}_LIBRARY_TYPE STREQUAL "SHARED" AND ${opm}_TARGET AND ${opm}_DEBUG)
+  # note that the DUNE parts that looks for dune.module is currently (2013-09) not
+  # multiarch-aware and will thus put in lib64/ on RHEL and lib/ on Debian
   install (
 	FILES ${PROJECT_SOURCE_DIR}/dune.module
-	DESTINATION lib${${opm}_VER_DIR}/dunecontrol/${${opm}_NAME}
+	DESTINATION ${LIBDIR_MULTIARCH_UNAWARE}${${opm}_VER_DIR}/dunecontrol/${${opm}_NAME}
 	)
 endmacro (opm_install opm)
diff --git a/cmake/Modules/UseDuneVer.cmake b/cmake/Modules/UseDuneVer.cmake
index 116de6ce9..93e3674f6 100644
--- a/cmake/Modules/UseDuneVer.cmake
+++ b/cmake/Modules/UseDuneVer.cmake
@@ -41,6 +41,11 @@ function (find_dune_version suite module)
 
   # some modules does not have a library, use the directory of the
   # header files to find what would be the library dir.
+  # note that when we refer to a build tree, then the libraries always
+  # go into lib/, but we don't care about that because in that case,
+  # dune.module isn't in the lib/ directory anyway but must be retrieved
+  # from the source. hence, we only have to worry about the library
+  # directory of a system installation here.
   if (NOT ${suite}-${module}_LIBRARY)
 	# this suffix is gotten from UseMultiArch.cmake
 	set (_lib_path "${_inc_path}/${CMAKE_INSTALL_LIBDIR}")
@@ -72,7 +77,7 @@ function (find_dune_version suite module)
 	# from this point on, _lib_path does not contain an architecture-
 	# specific component anymore; dune.module is always put in straight
 	# noarch lib/ since it does not contain any paths to binaries
-	set (_dune_mod "${_lib_path}/lib${_multilib}/dunecontrol/${suite}-${module}/dune.module")
+	set (_dune_mod "${_lib_path}/${LIBDIR_MULTIARCH_UNAWARE}${_multilib}/dunecontrol/${suite}-${module}/dune.module")
 	if (NOT EXISTS "${_dune_mod}")
 	  # use the name itself as a flag for whether it was found or not
 	  set (_dune_mod "")