diff --git a/src/mesa/vbo/vbo_split.c b/src/mesa/vbo/vbo_split.c
index 2f95746..08b2516 100644
--- a/src/mesa/vbo/vbo_split.c
+++ b/src/mesa/vbo/vbo_split.c
@@ -109,12 +109,16 @@ void vbo_split_prims( struct gl_context *ctx,
                      const struct split_limits *limits )
 {
    GLint max_basevertex = prim->basevertex;
+   GLint min_basevertex = prim->basevertex;
    GLuint i;
 
-   for (i = 1; i < nr_prims; i++)
+   for (i = 1; i < nr_prims; i++) {
       max_basevertex = MAX2(max_basevertex, prim[i].basevertex);
+      min_basevertex = MIN2(min_basevertex, prim[i].basevertex);
+   }
 
-   /* XXX max_basevertex is computed but not used, why? */
+   min_index += min_basevertex;
+   max_index += max_basevertex;
 
    if (ib) {
       if (limits->max_indices == 0) {
diff --git a/src/mesa/vbo/vbo_split_copy.c b/src/mesa/vbo/vbo_split_copy.c
index daa09c2..ac4fe9e 100644
--- a/src/mesa/vbo/vbo_split_copy.c
+++ b/src/mesa/vbo/vbo_split_copy.c
@@ -243,7 +243,7 @@ begin( struct copy_context *copy, GLenum mode, GLboolean begin_flag )
 static GLuint
 elt(struct copy_context *copy, GLuint elt_idx)
 {
-   GLuint elt = copy->srcelt[elt_idx];
+   GLuint elt = copy->srcelt[elt_idx] + copy->prim->basevertex;
    GLuint slot = elt & (ELT_TABLE_SIZE-1);
 
 /*    printf("elt %d\n", elt); */