diff --git a/src/render/gpu/SDL_render_gpu.c b/src/render/gpu/SDL_render_gpu.c
index d5f2775b82..c1ba99e89e 100644
--- a/src/render/gpu/SDL_render_gpu.c
+++ b/src/render/gpu/SDL_render_gpu.c
@@ -620,6 +620,8 @@ static bool InitVertexBuffer(GPU_RenderData *data, Uint32 size)
         return false;
     }
 
+    data->vertices.buffer_size = size;
+
     return true;
 }