diff --git a/src/mesa/drivers/dri/i965/gen7_urb.c b/src/mesa/drivers/dri/i965/gen7_urb.c
index a412a42..3c30879 100644
--- a/src/mesa/drivers/dri/i965/gen7_urb.c
+++ b/src/mesa/drivers/dri/i965/gen7_urb.c
@@ -291,7 +291,7 @@ gen7_upload_urb(struct brw_context *brw)
    unsigned remaining_space = urb_chunks - total_needs;
    if (remaining_space > total_wants)
       remaining_space = total_wants;
-   if (remaining_space > 0) {
+   if (remaining_space > 0 && total_wants > 0) {
       unsigned vs_additional = (unsigned)
          roundf(vs_wants * (((float) remaining_space) / total_wants));
       vs_chunks += vs_additional;