diff --git a/nanovdb/nanovdb/tools/GridBuilder.h b/nanovdb/nanovdb/tools/GridBuilder.h
index 30385661d0..428215ba65 100644
--- a/nanovdb/nanovdb/tools/GridBuilder.h
+++ b/nanovdb/nanovdb/tools/GridBuilder.h
@@ -1158,7 +1158,7 @@ struct LeafNode
         ValueIterator& operator=(const ValueIterator&) = default;
         ValueType operator*() const { NANOVDB_ASSERT(*this); return mParent->mValues[mPos];}
         Coord getCoord() const { NANOVDB_ASSERT(*this); return mParent->offsetToGlobalCoord(mPos);}
-        bool isActive() const { NANOVDB_ASSERT(*this); return mParent->isActive(mPos);}
+        bool isActive() const { NANOVDB_ASSERT(*this); return mParent->mValueMask.isOn(mPos);}
         operator bool() const {return mPos < SIZE;}
         ValueIterator& operator++() {++mPos; return *this;}
         ValueIterator operator++(int) {
diff --git a/openvdb/openvdb/tree/NodeManager.h b/openvdb/openvdb/tree/NodeManager.h
index 27a3f82012..1023c00748 100644
--- a/openvdb/openvdb/tree/NodeManager.h
+++ b/openvdb/openvdb/tree/NodeManager.h
@@ -328,7 +328,7 @@ class NodeList
         void operator()(const NodeRange& range) const
         {
             for (typename NodeRange::Iterator it = range.begin(); it; ++it) {
-                OpT::template eval(mNodeOp, it);
+                OpT::eval(mNodeOp, it);
             }
         }
         const NodeOp mNodeOp;
@@ -348,7 +348,7 @@ class NodeList
         void operator()(const NodeRange& range) const
         {
             for (typename NodeRange::Iterator it = range.begin(); it; ++it) {
-                OpT::template eval(mNodeOp, it);
+                OpT::eval(mNodeOp, it);
             }
         }
         const NodeOp& mNodeOp;
@@ -373,7 +373,7 @@ class NodeList
         void operator()(const NodeRange& range)
         {
             for (typename NodeRange::Iterator it = range.begin(); it; ++it) {
-                OpT::template eval(*mNodeOp, it);
+                OpT::eval(*mNodeOp, it);
             }
         }
         void join(const NodeReducer& other)