diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index ef60280..48fdbb5 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -606,7 +606,7 @@
                source.AsFpuRegister<XmmRegister>());
     } else if (source.IsConstant()) {
       HConstant* constant = source.GetConstant();
-      int64_t value = constant->AsLongConstant()->GetValue();
+      int64_t value;
       if (constant->IsDoubleConstant()) {
         value = bit_cast<int64_t, double>(constant->AsDoubleConstant()->GetValue());
       } else {