diff --git a/src/mesa/main/viewport.c b/src/mesa/main/viewport.c
index d66fdf26ed5..67735b08629 100644
--- a/src/mesa/main/viewport.c
+++ b/src/mesa/main/viewport.c
@@ -129,7 +129,6 @@ void GLAPIENTRY
 _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height)
 {
    GET_CURRENT_CONTEXT(ctx);
-   FLUSH_VERTICES(ctx, 0);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glViewport %d %d %d %d\n", x, y, width, height);