1 files changed, 9 insertions, 2 deletions
diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
index b7f4d8a307..35dc0e768f 100644
--- a/src/mesa/vbo/vbo_exec_api.c
+++ b/src/mesa/vbo/vbo_exec_api.c
@@ -309,16 +309,23 @@ static void vbo_exec_fixup_vertex( GLcontext *ctx,
 				   GLuint attr, GLuint sz )
 {
    struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
+   static const GLfloat id[4] = { 0, 0, 0, 1 };
    int i;
 
-   if (sz > exec->vtx.attrsz[attr]) {
+   if (exec->vtx.prim_count == 0) {
+      GLfloat *current = (GLfloat *)vbo_context(ctx)->currval[attr].Ptr;
+      exec->vtx.attrptr[attr] = current;
+      memcpy(current, id, sizeof(id));
+      ctx->Driver.NeedFlush |= FLUSH_UPDATE_CURRENT;
+      return;
+   }
+   else if (sz > exec->vtx.attrsz[attr]) {
       /* New size is larger.  Need to flush existing vertices and get
        * an enlarged vertex format.
        */
       vbo_exec_wrap_upgrade_vertex( exec, attr, sz );
    }
    else if (sz < exec->vtx.active_sz[attr]) {
-      static const GLfloat id[4] = { 0, 0, 0, 1 };
 
       /* New size is smaller - just need to fill in some
        * zeros.  Don't need to flush or wrap.