diff --git a/src/gallium/auxiliary/util/u_queue.c b/src/gallium/auxiliary/util/u_queue.c
index d0b137826d1..643c92b28b6 100644
--- a/src/gallium/auxiliary/util/u_queue.c
+++ b/src/gallium/auxiliary/util/u_queue.c
@@ -215,7 +215,7 @@ util_queue_init(struct util_queue *queue,
             goto fail;
          } else {
             /* at least one thread created, so use it */
-            queue->num_threads = i+1;
+            queue->num_threads = i;
             break;
          }
       }