diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 227ce39..853192c 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -734,6 +734,7 @@
         lis->addIntervalsForSpills(*spillInterval, spillIs, loopInfo, *vrm);
       addStackInterval(spillInterval, mri);
 
+      (void) oldSpillWeight;
       DEBUG(errs() << "VREG " << virtReg << " -> SPILLED (Cost: "
                    << oldSpillWeight << ", New vregs: ");