diff --git a/lib/CodeGen/AsmStream.cpp b/lib/CodeGen/AsmStream.cpp
index 4e9c56140d0..363f9c160e0 100644
--- a/lib/CodeGen/AsmStream.cpp
+++ b/lib/CodeGen/AsmStream.cpp
@@ -13,8 +13,6 @@
 
 #include "llvm/CodeGen/AsmStream.h"
 
-#include <unistd.h>
-
 namespace llvm {
   raw_asm_fd_ostream asmouts(STDOUT_FILENO, false);
   raw_asm_fd_ostream asmerrs(STDERR_FILENO, false);