diff --git a/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h b/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
index ac3497c..acbd276 100644
--- a/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
@@ -60,6 +60,8 @@
   unsigned PSInputAddr;
   bool ReturnsVoid;
 
+  unsigned MaximumWorkGroupSize;
+
 public:
   // FIXME: Make private
   unsigned LDSWaveSpillSize;