diff --git a/libraries/render/src/render/IndexedContainer.h b/libraries/render/src/render/IndexedContainer.h
index c5357791d8..847fb53bdf 100644
--- a/libraries/render/src/render/IndexedContainer.h
+++ b/libraries/render/src/render/IndexedContainer.h
@@ -78,7 +78,7 @@ namespace indexed_container {
         Index newElement(const Element& e) {
             Index index = _allocator.allocateIndex();
             if (index != INVALID_INDEX) {
-                if (index < _elements.size()) {
+                if (index < (Index) _elements.size()) {
                     _elements.emplace(_elements.begin() + index, e);
                 } else {
                     assert(index == _elements.size());