diff --git a/CMakeLists.txt b/CMakeLists.txt
index 91cfb74..b37e6e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@
 add_subdirectory(src)
 
 ## Installing
+include(GNUInstallDirs)
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/src/main/include/log4cxx
   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
   FILES_MATCHING PATTERN "*.h"