diff --git a/include/llvm/MC/MCSchedule.h b/include/llvm/MC/MCSchedule.h
index df3248ee6e8..66c5659af3a 100644
--- a/include/llvm/MC/MCSchedule.h
+++ b/include/llvm/MC/MCSchedule.h
@@ -14,7 +14,6 @@
 #ifndef LLVM_MC_MCSCHEDULE_H
 #define LLVM_MC_MCSCHEDULE_H
 
-#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/Support/DataTypes.h"
@@ -22,6 +21,7 @@
 
 namespace llvm {
 
+template <typename T> class ArrayRef;
 struct InstrItinerary;
 class MCSubtargetInfo;
 class MCInstrInfo;