diff --git a/include/Support/DataTypes.h b/include/Support/DataTypes.h
index b46135197ff..b1b88790ac6 100644
--- a/include/Support/DataTypes.h
+++ b/include/Support/DataTypes.h
@@ -21,7 +21,7 @@
 
 #include <inttypes.h>
 
-#ifdef LINUX
+#ifdef __linux__
 #define __STDC_LIMIT_MACROS 1
 #include <stdint.h>       // Defined by ISO C 99
 #include <endian.h>