diff --git a/src/gallium/drivers/virgl/virgl_screen.c b/src/gallium/drivers/virgl/virgl_screen.c
index 4c61580c0fd..6599f5f5c4c 100644
--- a/src/gallium/drivers/virgl/virgl_screen.c
+++ b/src/gallium/drivers/virgl/virgl_screen.c
@@ -936,7 +936,7 @@ static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 
    if (vws->flush_frontbuffer) {
       virgl_flush_eq(vctx, vctx, NULL);
-      vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
+      vws->flush_frontbuffer(vws, vctx->cbuf, vres->hw_res, level, layer, winsys_drawable_handle,
                              sub_box);
    }
 }
diff --git a/src/gallium/drivers/virgl/virgl_winsys.h b/src/gallium/drivers/virgl/virgl_winsys.h
index deb4f00f0fd..3d83ac728f2 100644
--- a/src/gallium/drivers/virgl/virgl_winsys.h
+++ b/src/gallium/drivers/virgl/virgl_winsys.h
@@ -135,6 +135,7 @@ struct virgl_winsys {
 
    /* for sw paths */
    void (*flush_frontbuffer)(struct virgl_winsys *vws,
+                             struct virgl_cmd_buf *cbuf,
                              struct virgl_hw_res *res,
                              unsigned level, unsigned layer,
                              void *winsys_drawable_handle,
diff --git a/src/gallium/winsys/virgl/vtest/virgl_vtest_winsys.c b/src/gallium/winsys/virgl/vtest/virgl_vtest_winsys.c
index 4dcc43f4806..fb9daaa57e6 100644
--- a/src/gallium/winsys/virgl/vtest/virgl_vtest_winsys.c
+++ b/src/gallium/winsys/virgl/vtest/virgl_vtest_winsys.c
@@ -21,6 +21,7 @@
  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 #include <stdio.h>
+#include "util/macros.h"
 #include "util/u_surface.h"
 #include "util/u_memory.h"
 #include "util/format/u_format.h"
@@ -630,6 +631,7 @@ static void virgl_fence_reference(struct virgl_winsys *vws,
 }
 
 static void virgl_vtest_flush_frontbuffer(struct virgl_winsys *vws,
+                                          UNUSED struct virgl_cmd_buf *cmdbuf,
                                           struct virgl_hw_res *res,
                                           unsigned level, unsigned layer,
                                           void *winsys_drawable_handle,