diff --git a/mir/CMakeLists.txt b/mir/CMakeLists.txt
index 981deb5..a92d0ca 100644
--- a/mir/CMakeLists.txt
+++ b/mir/CMakeLists.txt
@@ -56,6 +56,7 @@ if (COMPILER_OPT_NO_IPA_CP_CLONE_SUPPORTED AND NOT CMAKE_C_FLAGS MATCHES "-fno-i
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-ipa-cp-clone")
 endif()
 
+include(GNUInstallDirs)
 add_library(c2mir ${MIR_BUILD_TYPE}
     ${MIR_HEADERS}
     ${MIR_SRCS}