diff --git a/africanus/gridding/perleypolyhedron/policies/baseline_transform_policies.py b/africanus/gridding/perleypolyhedron/policies/baseline_transform_policies.py
index 0ea9d1642..57f17c8be 100644
--- a/africanus/gridding/perleypolyhedron/policies/baseline_transform_policies.py
+++ b/africanus/gridding/perleypolyhedron/policies/baseline_transform_policies.py
@@ -83,7 +83,7 @@ def policy(uvw, ra0, dec0, ra, dec, policy_type):
     pass
 
 
-@overload(policy, inline="always")
+@overload(policy, inline="always", prefer_literal=True)
 def policy_impl(uvw, ra0, dec0, ra, dec, policy_type):
     if policy_type.literal_value == "None":
         return uvw_norotate
diff --git a/africanus/gridding/perleypolyhedron/policies/convolution_policies.py b/africanus/gridding/perleypolyhedron/policies/convolution_policies.py
index 2093be11c..4a1152640 100644
--- a/africanus/gridding/perleypolyhedron/policies/convolution_policies.py
+++ b/africanus/gridding/perleypolyhedron/policies/convolution_policies.py
@@ -349,7 +349,7 @@ def policy(
     pass
 
 
-@overload(policy, inline="always")
+@overload(policy, inline="always", prefer_literal=True)
 def policy_impl(
     scaled_u,
     scaled_v,
diff --git a/africanus/gridding/perleypolyhedron/policies/phase_transform_policies.py b/africanus/gridding/perleypolyhedron/policies/phase_transform_policies.py
index b42e490d1..1b6ab6175 100644
--- a/africanus/gridding/perleypolyhedron/policies/phase_transform_policies.py
+++ b/africanus/gridding/perleypolyhedron/policies/phase_transform_policies.py
@@ -38,7 +38,7 @@ def policy(vis, uvw, lambdas, ra0, dec0, ra, dec, policy_type, phasesign=1.0):
     pass
 
 
-@overload(policy, inline="always")
+@overload(policy, inline="always", prefer_literal=True)
 def policy_impl(vis, uvw, lambdas, ra0, dec0, ra, dec, policy_type, phasesign=1.0):
     if policy_type.literal_value == "None" or policy_type.literal_value is None:
         return phase_norotate
diff --git a/africanus/gridding/perleypolyhedron/policies/stokes_conversion_policies.py b/africanus/gridding/perleypolyhedron/policies/stokes_conversion_policies.py
index 873fd744d..c1e9d94c9 100644
--- a/africanus/gridding/perleypolyhedron/policies/stokes_conversion_policies.py
+++ b/africanus/gridding/perleypolyhedron/policies/stokes_conversion_policies.py
@@ -5,7 +5,7 @@ def stokes2corr(vis_in, vis_out, policy_type):
     pass
 
 
-@overload(stokes2corr, inline="always")
+@overload(stokes2corr, inline="always", prefer_literal=True)
 def stokes2corrimpl(vis_in, vis_out, policy_type):
     if policy_type.literal_value == "XXYY_FROM_I":
 
@@ -143,7 +143,7 @@ def corr2stokes(vis_in, policy_type):
     pass
 
 
-@overload(corr2stokes, inline="always")
+@overload(corr2stokes, inline="always", prefer_literal=True)
 def corr2stokesimpl(vis_in, policy_type):
     if policy_type.literal_value == "I_FROM_XXYY":
         return lambda vis_in, policy_type: (vis_in[0] + vis_in[1]) * 0.5
@@ -183,7 +183,7 @@ def ncorr_out(policy_type):
     pass
 
 
-@overload(ncorr_out, inline="always")
+@overload(ncorr_out, inline="always", prefer_literal=True)
 def ncorr_outimpl(policy_type):
     if policy_type.literal_value == "XXYY_FROM_I":
         return lambda policy_type: 2