diff --git a/src/platform/sdl/CMakeLists.txt b/src/platform/sdl/CMakeLists.txt
index 107761d8c..844fe762b 100644
--- a/src/platform/sdl/CMakeLists.txt
+++ b/src/platform/sdl/CMakeLists.txt
@@ -110,7 +110,7 @@ if(ENABLE_SCRIPTING)
 endif()
 
 add_executable(${BINARY_NAME}-sdl WIN32 ${PLATFORM_SRC} ${MAIN_SRC})
-set_target_properties(${BINARY_NAME}-sdl PROPERTIES COMPILE_DEFINITIONS "${FEATURE_DEFINES};${FUNCTION_DEFINES}")
+set_target_properties(${BINARY_NAME}-sdl PROPERTIES COMPILE_DEFINITIONS "${FEATURE_DEFINES};${FUNCTION_DEFINES};${OS_DEFINES}")
 target_link_libraries(${BINARY_NAME}-sdl ${BINARY_NAME} ${PLATFORM_LIBRARY} ${OPENGL_LIBRARY} ${OPENGLES2_LIBRARY})
 if(NOT WIN32)
 	set_target_properties(${BINARY_NAME}-sdl PROPERTIES OUTPUT_NAME ${BINARY_NAME})