diff --git a/src/gallium/frontends/wgl/stw_framebuffer.c b/src/gallium/frontends/wgl/stw_framebuffer.c
index c811946e08e..63c6939a2d6 100644
--- a/src/gallium/frontends/wgl/stw_framebuffer.c
+++ b/src/gallium/frontends/wgl/stw_framebuffer.c
@@ -733,7 +733,8 @@ stw_framebuffer_swap_locked(HDC hdc, struct stw_framebuffer *fb)
    struct stw_context *ctx = stw_current_context();
    if (!(fb->pfi->pfd.dwFlags & PFD_DOUBLEBUFFER)) {
       stw_framebuffer_unlock(fb);
-      stw_st_flush(ctx->st, fb->drawable, ST_FLUSH_END_OF_FRAME | ST_FLUSH_FRONT);
+      if (ctx)
+         stw_st_flush(ctx->st, fb->drawable, ST_FLUSH_END_OF_FRAME | ST_FLUSH_FRONT);
       return true;
    }