diff --git a/jax_galsim/interpolant.py b/jax_galsim/interpolant.py
index 2e18986d..1b489398 100644
--- a/jax_galsim/interpolant.py
+++ b/jax_galsim/interpolant.py
@@ -1498,12 +1498,16 @@ def _xval_noraise(self, x):
     # it gets recompiled as needed for combinations of n, conserve_dc, du, and krange
     @functools.partial(jax.jit, static_argnames=("n", "conserve_dc", "du", "krange"))
     def _interp_kval(k, n, conserve_dc, du, krange):
-        _idata = _lanczos_kval_interp_table(
-            n,
-            du,
-            krange,
-            conserve_dc,
-        )
+        with jax.ensure_compile_time_eval():
+            _idata = _lanczos_kval_interp_table(
+                n,
+                # jax-galsim uses a slightly less accurate interpolation
+                # function (akima vs cubic spline) and so needs a smaller spacing
+                # 2.3x appears to be ok
+                du / 2.3,
+                krange,
+                conserve_dc,
+            )
         return akima_interp(jnp.abs(k), *_idata, fixed_spacing=True)
 
     def _kval_noraise(self, k):
diff --git a/tests/GalSim b/tests/GalSim
index 89723bcd..bcaad957 160000
--- a/tests/GalSim
+++ b/tests/GalSim
@@ -1 +1 @@
-Subproject commit 89723bcd581b5fc5d00acaab0b23fd38df171fdc
+Subproject commit bcaad9579dfc67d0542a2f6cbc6e900c8c7a549b