diff --git a/lib/CodeGen/LiveIntervalUnion.h b/lib/CodeGen/LiveIntervalUnion.h
index 4d2c4cb3add..6a61614df42 100644
--- a/lib/CodeGen/LiveIntervalUnion.h
+++ b/lib/CodeGen/LiveIntervalUnion.h
@@ -22,7 +22,6 @@
 
 namespace llvm {
 
-class MachineLoopRange;
 class TargetRegisterInfo;
 
 #ifndef NDEBUG