diff --git a/src/gallium/winsys/sw/wrapper/wrapper_sw_winsys.c b/src/gallium/winsys/sw/wrapper/wrapper_sw_winsys.c
index 77220cf7797..4ecfdbf3915 100644
--- a/src/gallium/winsys/sw/wrapper/wrapper_sw_winsys.c
+++ b/src/gallium/winsys/sw/wrapper/wrapper_sw_winsys.c
@@ -246,6 +246,7 @@ wsw_dt_unmap(struct sw_winsys *ws,
 
    pipe->transfer_unmap(pipe, wdt->transfer);
    pipe->transfer_destroy(pipe, wdt->transfer);
+   pipe->flush(pipe, 0, NULL);
    wdt->transfer = NULL;
 }