diff --git a/src/render/gpu/SDL_render_gpu.c b/src/render/gpu/SDL_render_gpu.c
index 918f147622..7113e7a1e0 100644
--- a/src/render/gpu/SDL_render_gpu.c
+++ b/src/render/gpu/SDL_render_gpu.c
@@ -722,6 +722,8 @@ static bool InitVertexBuffer(GPU_RenderData *data, Uint32 size)
         return false;
     }
 
+    data->vertices.buffer_size = size;
+
     return true;
 }