diff --git a/loopy/transform/ilp.py b/loopy/transform/ilp.py
index 534c6b7498a168e85be4a52c2b469215bcd9c9a2..f3b7d3f0e8f9fae1847ad4eea42175cddadfe5d9 100644
--- a/loopy/transform/ilp.py
+++ b/loopy/transform/ilp.py
@@ -154,7 +154,8 @@ def add_axes_to_temporaries_for_ilp_and_vec(kernel, iname=None):
         new_temp_vars[tv.name] = tv.copy(shape=shape + extra_shape,
                 # Forget what you knew about data layout,
                 # create from scratch.
-                dim_tags=dim_tags)
+                dim_tags=dim_tags,
+                dim_names=None)
 
     # }}}