diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 7515452049e..1c5a9ba8189 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -3477,6 +3477,8 @@ iris_set_vertex_buffers(struct pipe_context *ctx,
 #endif
          } else {
             vb.NullVertexBuffer = true;
+            vb.MOCS = iris_mocs(NULL, &screen->isl_dev,
+                                ISL_SURF_USAGE_VERTEX_BUFFER_BIT);
          }
       }
    }