diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp
index be4f546a07a..fcc78c05507 100644
--- a/lib/CodeGen/LiveVariables.cpp
+++ b/lib/CodeGen/LiveVariables.cpp
@@ -28,6 +28,7 @@
 
 #include "llvm/CodeGen/LiveVariables.h"
 #include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/MRegisterInfo.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/CFG.h"
diff --git a/lib/Target/X86/PeepholeOptimizer.cpp b/lib/Target/X86/PeepholeOptimizer.cpp
index 66508376cdc..59ebb152195 100644
--- a/lib/Target/X86/PeepholeOptimizer.cpp
+++ b/lib/Target/X86/PeepholeOptimizer.cpp
@@ -14,6 +14,7 @@
 #include "X86.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/Target/MRegisterInfo.h"
 #include "Support/Statistic.h"
 using namespace llvm;
 
diff --git a/lib/Target/X86/X86PeepholeOpt.cpp b/lib/Target/X86/X86PeepholeOpt.cpp
index 66508376cdc..59ebb152195 100644
--- a/lib/Target/X86/X86PeepholeOpt.cpp
+++ b/lib/Target/X86/X86PeepholeOpt.cpp
@@ -14,6 +14,7 @@
 #include "X86.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/Target/MRegisterInfo.h"
 #include "Support/Statistic.h"
 using namespace llvm;