diff --git a/llvm/lib/CodeGen/CalcSpillWeights.cpp b/llvm/lib/CodeGen/CalcSpillWeights.cpp
index 6d0a02f..bf97aae 100644
--- a/llvm/lib/CodeGen/CalcSpillWeights.cpp
+++ b/llvm/lib/CodeGen/CalcSpillWeights.cpp
@@ -244,7 +244,7 @@
     // Get allocation hints from copies.
     if (!mi->isCopy())
       continue;
-    unsigned hint = copyHint(mi, li.reg, tri, mri);
+    Register hint = copyHint(mi, li.reg, tri, mri);
     if (!hint)
       continue;
     // Force hweight onto the stack so that x86 doesn't add hidden precision,