--- base/sys_info.h
+++ base/sys_info.h
@@ -67,7 +67,7 @@ class SysInfo {
   // allocate.
   static size_t VMAllocationGranularity();
 
-#if defined(OS_LINUX)
+#if defined(OS_NIX)
   // Returns the maximum SysV shared memory segment size.
   static size_t MaxSharedMemorySize();
 #endif
diff --git base/sys_info_posix.cc base/sys_info_posix.cc
index 34d9df3..fa35cf7 100644