diff --git a/src/ia32/codegen-ia32.cc b/src/ia32/codegen-ia32.cc
index 66a1774e8d..d0d30450b0 100644
--- a/src/ia32/codegen-ia32.cc
+++ b/src/ia32/codegen-ia32.cc
@@ -7333,7 +7333,7 @@ void CodeGenerator::VisitCountOperation(CountOperation* node) {
         __ setcc(overflow, tmp.reg());
         __ or_(Operand(tmp.reg()), new_value.reg());
         __ test(tmp.reg(), Immediate(kSmiTagMask));
-        tmp.Unusec();
+        tmp.Unuse();
         deferred->Branch(not_zero);
       } else {
         // Otherwise we test separately for overflow and smi tag.