diff --git a/packages/core/src/geometry/GeometrySystem.js b/packages/core/src/geometry/GeometrySystem.js
index 959f827..9b59f86 100644
--- a/packages/core/src/geometry/GeometrySystem.js
+++ b/packages/core/src/geometry/GeometrySystem.js
@@ -178,6 +178,7 @@
                 }
                 else
                 {
+                    glBuffer.byteLength = buffer.data.byteLength;
                     gl.bufferData(type, buffer.data, drawType);
                 }
             }