diff --git a/src/mesa/main/matrix.c b/src/mesa/main/matrix.c
index 5ff5ac5bfe1..2b8016a4a72 100644
--- a/src/mesa/main/matrix.c
+++ b/src/mesa/main/matrix.c
@@ -151,6 +151,7 @@ _mesa_MatrixMode( GLenum mode )
 
    if (ctx->Transform.MatrixMode == mode && mode != GL_TEXTURE)
       return;
+   FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
 
    switch (mode) {
    case GL_MODELVIEW: