diff --git a/lib/Target/AMDGPU/SIRegisterInfo.h b/lib/Target/AMDGPU/SIRegisterInfo.h
index 6fab3eda32b..0597728f7f1 100644
--- a/lib/Target/AMDGPU/SIRegisterInfo.h
+++ b/lib/Target/AMDGPU/SIRegisterInfo.h
@@ -24,7 +24,6 @@ namespace llvm {
 
 class GCNSubtarget;
 class LiveIntervals;
-class MachineRegisterInfo;
 class SIMachineFunctionInfo;
 
 class SIRegisterInfo final : public AMDGPUGenRegisterInfo {