--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -93,7 +93,7 @@
 set (prefix ${CMAKE_INSTALL_PREFIX})
 set (exec_prefix "\${prefix}")
 set (lib_postfix ${CMAKE_DEBUG_POSTFIX})
-set (libdir "\${exec_prefix}/${LIBDIR}")
+set (libdir "${LIBDIR}")
 set (includedir "\${prefix}/${INCDIR}")
 set (bindir "\${exec_prefix}/${BINDIR}")
 set (PACKAGE_NAME "${PROJECT_NAME}")