diff --git a/src/gallium/drivers/nv50/nv50_vbo.c b/src/gallium/drivers/nv50/nv50_vbo.c
index 82ac35e84ea..0ce19bec4af 100644
--- a/src/gallium/drivers/nv50/nv50_vbo.c
+++ b/src/gallium/drivers/nv50/nv50_vbo.c
@@ -404,6 +404,12 @@ nv50_draw_arrays(struct nv50_context *nv50,
    struct nouveau_channel *chan = nv50->screen->base.channel;
    unsigned prim;
 
+   if (nv50->state.index_bias) {
+      BEGIN_RING(chan, RING_3D(VB_ELEMENT_BASE), 1);
+      OUT_RING  (chan, 0);
+      nv50->state.index_bias = 0;
+   }
+
    prim = nv50_prim_gl(mode);
 
    while (instance_count--) {
diff --git a/src/gallium/drivers/nvc0/nvc0_vbo.c b/src/gallium/drivers/nvc0/nvc0_vbo.c
index 41b45521d8a..ac778a7491c 100644
--- a/src/gallium/drivers/nvc0/nvc0_vbo.c
+++ b/src/gallium/drivers/nvc0/nvc0_vbo.c
@@ -382,6 +382,11 @@ nvc0_draw_arrays(struct nvc0_context *nvc0,
    struct nouveau_channel *chan = nvc0->screen->base.channel;
    unsigned prim;
 
+   if (nvc0->state.index_bias) {
+      IMMED_RING(chan, RING_3D(VB_ELEMENT_BASE), 0);
+      nvc0->state.index_bias = 0;
+   }
+
    prim = nvc0_prim_gl(mode);
 
    while (instance_count--) {