diff --git a/src/re/refine/charted_field.py b/src/re/refine/charted_field.py
index eec87c39b8c0b9dcd4e3a6e8a45943efe22814d8..067db6dd9776d9f209dbe07c60b51694c0a575e4 100644
--- a/src/re/refine/charted_field.py
+++ b/src/re/refine/charted_field.py
@@ -24,7 +24,7 @@ def _coordinate_pixel_refinement_matrices(
     pixel_index: Optional[Iterable[int]] = None,
     kernel: Optional[Callable] = None,
     *,
-    coerce_fine_kernel: bool = True,
+    coerce_fine_kernel: bool = False,
     _cov_from_loc: Optional[Callable] = None,
 ) -> Tuple[jnp.ndarray, jnp.ndarray]:
     cov_from_loc = get_cov_from_loc(kernel, _cov_from_loc)
@@ -76,7 +76,7 @@ def _coordinate_refinement_matrices(
     *,
     depth: Optional[int] = None,
     skip0=False,
-    coerce_fine_kernel: bool = True,
+    coerce_fine_kernel: bool = False,
     _cov_from_loc=None
 ) -> RefinementMatrices:
     cov_from_loc = get_cov_from_loc(kernel, _cov_from_loc)
@@ -319,7 +319,7 @@ class RefinementField(AbstractModel):
         *,
         skip0: bool = False,
         depth: Optional[int] = None,
-        coerce_fine_kernel: bool = True,
+        coerce_fine_kernel: bool = False,
         _refine: Optional[Callable] = None,
         _cov_from_loc: Optional[Callable] = None,
         precision=None,
diff --git a/src/re/refine/healpix_field.py b/src/re/refine/healpix_field.py
index b93ebd3001608e4f7c6e3ce0f4e4af15e13581d7..2892b87336086126534bfa30ade7a2da86519700 100644
--- a/src/re/refine/healpix_field.py
+++ b/src/re/refine/healpix_field.py
@@ -27,7 +27,7 @@ def _matrices_naive(
     kernel: Callable,
     depth: int,
     *,
-    coerce_fine_kernel: bool = True,
+    coerce_fine_kernel: bool = False,
 ):
     cov_from_loc = get_cov_from_loc(kernel)
 
@@ -84,7 +84,7 @@ def _matrices_tol(
     kernel: Callable,
     depth: int,
     *,
-    coerce_fine_kernel: bool = True,
+    coerce_fine_kernel: bool = False,
     atol: Optional[float] = None,
     rtol: Optional[float] = None,
     which: Optional[str] = "dist",
@@ -229,7 +229,7 @@ class RefinementHPField(AbstractModel):
         depth: Optional[int] = None,
         skip0: Optional[bool] = None,
         *,
-        coerce_fine_kernel: bool = True,
+        coerce_fine_kernel: bool = False,
         atol: Optional[float] = None,
         rtol: Optional[float] = None,
         which: Optional[str] = "dist",
@@ -338,7 +338,7 @@ class RefinementHPField(AbstractModel):
         kernel: Union[Callable, RefinementMatrices],
         *,
         skip0: bool = False,
-        coerce_fine_kernel: bool = True,
+        coerce_fine_kernel: bool = False,
         _refine: Optional[Callable] = None,
         precision=None,
     ):