diff --git a/pytential/qbx/__init__.py b/pytential/qbx/__init__.py
index 3e4e1026b..a6261ba59 100644
--- a/pytential/qbx/__init__.py
+++ b/pytential/qbx/__init__.py
@@ -603,6 +603,9 @@ def exec_compute_potential_insn_fmm(self, actx: PyOpenCLArrayContext,
                     geo_data.tree().user_source_ids,
                     insn.kernel_arguments, evaluate))
 
+        from sumpy.fmm import SumpyTranslationClassesData
+        translation_classes_data = SumpyTranslationClassesData(actx.queue,
+                geo_data.traversal())
         tree_indep = self._tree_indep_data_for_wrangler(
                 target_kernels=insn.target_kernels,
                 source_kernels=insn.source_kernels)
@@ -612,7 +615,8 @@ def exec_compute_potential_insn_fmm(self, actx: PyOpenCLArrayContext,
                         self.qbx_order,
                         self.fmm_level_to_order,
                         source_extra_kwargs=source_extra_kwargs,
-                        kernel_extra_kwargs=kernel_extra_kwargs)
+                        kernel_extra_kwargs=kernel_extra_kwargs,
+                        translation_classes_data=translation_classes_data)
 
         from pytential.qbx.geometry import target_state
         if actx.to_numpy(actx.np.any(
diff --git a/pytential/qbx/fmm.py b/pytential/qbx/fmm.py
index 91cce641a..5bf14c535 100644
--- a/pytential/qbx/fmm.py
+++ b/pytential/qbx/fmm.py
@@ -112,13 +112,14 @@ class QBXExpansionWrangler(SumpyExpansionWrangler):
     def __init__(self, tree_indep, geo_data, dtype,
             qbx_order, fmm_level_to_order,
             source_extra_kwargs, kernel_extra_kwargs,
-            _use_target_specific_qbx=None):
+            translation_classes_data=None, *, _use_target_specific_qbx=None):
         if _use_target_specific_qbx:
             raise ValueError("TSQBX is not implemented in sumpy")
 
         super().__init__(
                 tree_indep, geo_data.traversal(),
-                dtype, fmm_level_to_order, source_extra_kwargs, kernel_extra_kwargs)
+                dtype, fmm_level_to_order, source_extra_kwargs, kernel_extra_kwargs,
+                translation_classes_data=translation_classes_data)
 
         self.qbx_order = qbx_order
         self.geo_data = geo_data
diff --git a/pytential/qbx/fmmlib.py b/pytential/qbx/fmmlib.py
index c2029ad1b..e91a9fe62 100644
--- a/pytential/qbx/fmmlib.py
+++ b/pytential/qbx/fmmlib.py
@@ -153,7 +153,8 @@ class QBXFMMLibExpansionWrangler(FMMLibExpansionWrangler):
     def __init__(self, tree_indep, geo_data, dtype,
             qbx_order, fmm_level_to_order,
             source_extra_kwargs,
-            kernel_extra_kwargs,
+            kernel_extra_kwargs, *,
+            translation_classes_data=None,
             _use_target_specific_qbx=None):
         # FMMLib is CPU-only. This wrapper gets the geometry out of
         # OpenCL-land.
diff --git a/pytential/unregularized.py b/pytential/unregularized.py
index 8502b8a8f..00bba1c7b 100644
--- a/pytential/unregularized.py
+++ b/pytential/unregularized.py
@@ -256,12 +256,16 @@ def exec_compute_potential_insn_fmm(self, actx: PyOpenCLArrayContext,
         tree_indep = self._tree_indep_data_for_wrangler(
                 fmm_kernel, target_kernels=insn.target_kernels,
                 source_kernels=insn.source_kernels)
+        from sumpy.fmm import SumpyTranslationClassesData
+        translation_classes_data = SumpyTranslationClassesData(actx.queue,
+                geo_data.traversal())
 
         from sumpy.fmm import SumpyExpansionWrangler
         wrangler = SumpyExpansionWrangler(
                 tree_indep, geo_data.traversal(),
                 output_and_expansion_dtype,
                 self.fmm_level_to_order,
+                translation_classes_data=translation_classes_data,
                 source_extra_kwargs=source_extra_kwargs,
                 kernel_extra_kwargs=kernel_extra_kwargs)