diff --git a/utils/KillTheDoctor/KillTheDoctor.cpp b/utils/KillTheDoctor/KillTheDoctor.cpp
index a85dac8ae85..111bad20958 100644
--- a/utils/KillTheDoctor/KillTheDoctor.cpp
+++ b/utils/KillTheDoctor/KillTheDoctor.cpp
@@ -37,7 +37,6 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Errc.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/Signals.h"