diff --git a/sumpy/qbx.py b/sumpy/qbx.py
index 7697bdd9e857e12b6ce08b95bd4d90c02f818fdc..d1533cf8f7cf1934b912a2c8ecf2949f1c19959d 100644
--- a/sumpy/qbx.py
+++ b/sumpy/qbx.py
@@ -153,7 +153,7 @@ class LayerPotentialBase(KernelComputation, KernelCacheWrapper):
                 lp.GlobalArg("tgt", None,
                     shape=(self.dim, "ntargets"), order="C"),
                 lp.GlobalArg("center", None,
-                    shape=(self.dim, "ntargets"), order="C"),
+                    shape=(self.dim, "ntargets"), dim_tags="sep,C"),
                 lp.GlobalArg("expansion_radii",
                     None, shape="ntargets"),
                 lp.ValueArg("nsources", None),