diff --git a/miniwin/src/d3drm/backends/opengl1/renderer.cpp b/miniwin/src/d3drm/backends/opengl1/renderer.cpp
index 7015c7c6..b0f67a39 100644
--- a/miniwin/src/d3drm/backends/opengl1/renderer.cpp
+++ b/miniwin/src/d3drm/backends/opengl1/renderer.cpp
@@ -271,7 +271,7 @@ GLMeshCacheEntry GLUploadMesh(const MeshGroup& meshGroup, bool useVBOs)
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cache.ibo);
 		glBufferData(
 			GL_ELEMENT_ARRAY_BUFFER,
-			cache.indices.size() * sizeof(Uint16),
+			cache.indices.size() * sizeof(cache.indices[0]),
 			cache.indices.data(),
 			GL_STATIC_DRAW
 		);