diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8429585..94f80aa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -148,6 +148,9 @@ if(NOT DEFINED CDOGS_DATA_DIR)
 	endif()
 endif()
 message("Data dir is ${CDOGS_DATA_DIR}")
+if(NOT DEFINED DATA_INSTALL_DIR)
+  set(DATA_INSTALL_DIR "${CDOGS_DATA_DIR}")
+endif()
 if(WIN32)
 	set(CDOGS_CFG_DIR "C-Dogs SDL/")
 else()
@@ -200,7 +203,6 @@ elseif(APPLE)
 	set(INSTALL_PREFIX "cdogs-sdl")
 else()
 	set(LIB_EXTENSION ".so")
-	set(DATA_INSTALL_DIR ".")
 endif()
 
 # Since Debian wants games binaries in /usr/games