--- base/logging.h
+++ base/logging.h
@@ -153,7 +153,7 @@ void SetMinLogLevel(int level);
 // Gets the current log level.
 int GetMinLogLevel();
 
-#if defined(OS_LINUX)
+#if defined(OS_NIX)
 // Get the file descriptor used for logging.
 // Returns -1 if none open.
 // Needed by ZygoteManager.
diff --git base/message_loop.cc base/message_loop.cc
index ddca7db..d8eb6ca 100644