diff --git a/lib/Support/Unix/Host.inc b/lib/Support/Unix/Host.inc
index ce21d358aab..fcb3638d1ce 100644
--- a/lib/Support/Unix/Host.inc
+++ b/lib/Support/Unix/Host.inc
@@ -22,7 +22,6 @@
 #include <sys/utsname.h>
 #include <cctype>
 #include <string>
-#include <cstdlib> // ::getenv
 
 using namespace llvm;