diff --git a/gtsam/linear/linearAlgorithms-inst.h b/gtsam/linear/linearAlgorithms-inst.h
index 4ec8c9a07..181d8028a 100644
--- a/gtsam/linear/linearAlgorithms-inst.h
+++ b/gtsam/linear/linearAlgorithms-inst.h
@@ -77,8 +77,9 @@ namespace gtsam
               xS.resize(dim);
               DenseIndex vectorPos = 0;
               BOOST_FOREACH(const VectorValues::const_iterator& parentPointer, parentPointers) {
-                xS.segment(vectorPos, parentPointer->second.size()) = parentPointer->second;
-                vectorPos += parentPointer->second.size();
+                const Vector& parentVector = parentPointer->second;
+                xS.block(vectorPos,0,parentVector.size(),1) = parentVector.block(0,0,parentVector.size(),1);
+                vectorPos += parentVector.size();
               }
             }
             xS = c.getb() - c.get_S() * xS;
diff --git a/gtsam/nonlinear/ISAM2-inl.h b/gtsam/nonlinear/ISAM2-inl.h
index d41100ea2..0d33308fb 100644
--- a/gtsam/nonlinear/ISAM2-inl.h
+++ b/gtsam/nonlinear/ISAM2-inl.h
@@ -183,8 +183,9 @@ bool optimizeWildfireNode(const boost::shared_ptr<CLIQUE>& clique, double thresh
           xS.resize(dim);
           DenseIndex vectorPos = 0;
           BOOST_FOREACH(const VectorValues::const_iterator& parentPointer, parentPointers) {
-            xS.segment(vectorPos, parentPointer->second.size()) = parentPointer->second;
-            vectorPos += parentPointer->second.size();
+            const Vector& parentVector = parentPointer->second;
+            xS.block(vectorPos,0,parentVector.size(),1) = parentVector.block(0,0,parentVector.size(),1);
+            vectorPos += parentVector.size();
           }
         }
         xS = c.getb() - c.get_S() * xS;