diff --git a/pymaster/utils.py b/pymaster/utils.py
index 0e99026..2a4fbcf 100644
--- a/pymaster/utils.py
+++ b/pymaster/utils.py
@@ -852,7 +852,8 @@ def _map2alm_healpy(map, spin, sht_info, alm_info):
 def _catalog2alm_ducc0(values, positions, spin, lmax):
     values = np.atleast_2d(values)
     alm = ducc0.sht.adjoint_synthesis_general(lmax=lmax, map=values,
-                                              loc=positions.T, spin=int(spin))
+                                              loc=positions.T, spin=int(spin),
+                                              epsilon=1E-5)
     return alm