diff --git a/CMakeLists.txt b/CMakeLists.txt
index b05d2147..c61ecf35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -123,7 +123,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
 	set(D_PLATFORM_WINDOWS 1)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 	set(D_PLATFORM_LINUX 1)
-elseif(CMAKE_SYSTEM_NAME STREQUAL "Mac")
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
 	set(D_PLATFORM_MAC 1)
 else()
 	message(FATAL_ERROR "Unknown platform, please file a bug with your exact setup if you believe this to be an error.")