diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0806f461c6..29d81b0948 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -169,15 +169,15 @@ elseif(UNIX) # Linux, BSD etc
 		set(LOCALEDIR "locale")
 	else()
 		include(GNUInstallDirs)
-		set(SHAREDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}")
-		set(BINDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
-		set(DOCDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DOCDIR}")
-		set(MANDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_MANDIR}")
+		set(SHAREDIR "${CMAKE_INSTALL_FULL_DATADIR}/${PROJECT_NAME}")
+		set(BINDIR "${CMAKE_INSTALL_FULL_BINDIR}")
+		set(DOCDIR "${CMAKE_INSTALL_FULL_DOCDIR}")
+		set(MANDIR "${CMAKE_INSTALL_FULL_MANDIR}")
 		set(EXAMPLE_CONF_DIR ${DOCDIR})
-		set(XDG_APPS_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/applications")
-		set(METAINFODIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/metainfo")
-		set(ICONDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/icons")
-		set(LOCALEDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LOCALEDIR}")
+		set(XDG_APPS_DIR "${CMAKE_INSTALL_FULL_DATADIR}/applications")
+		set(METAINFODIR "${CMAKE_INSTALL_FULL_DATADIR}/metainfo")
+		set(ICONDIR "${CMAKE_INSTALL_FULL_DATADIR}/icons")
+		set(LOCALEDIR "${CMAKE_INSTALL_FULL_LOCALEDIR}")
 	endif()
 endif()