diff --git a/src/gpu-compute/gpu_render_driver.hh b/src/gpu-compute/gpu_render_driver.hh
index 5a4ce1b02b..f94fdef56e 100644
--- a/src/gpu-compute/gpu_render_driver.hh
+++ b/src/gpu-compute/gpu_render_driver.hh
@@ -46,7 +46,7 @@ class GPURenderDriver final : public EmulatedDriver
     int open(ThreadContext *tc, int mode, int flags) override;
 
     int
-    ioctl(ThreadContext *tc, unsigned req, Addr buf)
+    ioctl(ThreadContext *tc, unsigned req, Addr buf) override
     {
         return -EBADF;
     }