diff --git a/gtsam/inference/VariableIndex-inl.h b/gtsam/inference/VariableIndex-inl.h
index 4e8d36146..e552c685a 100644
--- a/gtsam/inference/VariableIndex-inl.h
+++ b/gtsam/inference/VariableIndex-inl.h
@@ -28,7 +28,7 @@ void VariableIndex::augment(const FG& factors, boost::optional<const FastVector<
   gttic(VariableIndex_augment);
 
   // Save original number of factors for keeping track of indices
-  const size_t originalNFactors = nFactors_;
+//  const size_t originalNFactors = nFactors_;
 
   // Augment index for each factor
   for(size_t i = 0; i < factors.size(); ++i)