diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c8022b14..309a784e6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -227,7 +227,6 @@ IF(CMAKE_COMPILER_IS_GNUCXX OR MINGW)
 
 	string(TOUPPER "${CMAKE_BUILD_TYPE}" ZG_BUILD_TYPE)
 
-	add_definitions("-DDATADIR=${INSTALL_DIR_DATA}")
 	SET(CMAKE_CXX_FLAGS_{ZG_BUILD_TYPE} "${CMAKE_CXX_FLAGS_${ZG_BUILD_TYPE}}")
 
 	# We do some funky character escaping to get the right stuff written out to
@@ -328,6 +327,8 @@ IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     MESSAGE(WARNING ">> CLANG is NOT currently compatible as it does not support the following essential GCC compiler settings: -frounding-math -fsignaling-nans")
 ENDIF()
 
+# FIXME: This should output all defines. For example, DATADIR is defined in
+# the glest_game source and sharedlib cmake file as well
 get_directory_property( DirDefs DIRECTORY ${CMAKE_SOURCE_DIR} COMPILE_DEFINITIONS )
 foreach( d ${DirDefs} )
     message( STATUS "=====> Found Define: " ${d} )