diff --git a/libraries/render/src/render/IndexedContainer.h b/libraries/render/src/render/IndexedContainer.h
index 4b51f8eb3c..2d21b5cc29 100644
--- a/libraries/render/src/render/IndexedContainer.h
+++ b/libraries/render/src/render/IndexedContainer.h
@@ -87,7 +87,7 @@ namespace indexed_container {
                 if (index < (Index) _elements.size()) {
                     _elements[index] = e;
                 } else {
-                    assert(index == _elements.size());
+                    assert(index == (Index)_elements.size());
                     _elements.emplace_back(e);
                 }
             }
@@ -159,4 +159,4 @@ namespace indexed_container {
     };
 };
 }
-#endif
\ No newline at end of file
+#endif