diff --git a/ngclearn/components/neurons/spiking/LIFCell.py b/ngclearn/components/neurons/spiking/LIFCell.py
index 0358b494..37c51df9 100644
--- a/ngclearn/components/neurons/spiking/LIFCell.py
+++ b/ngclearn/components/neurons/spiking/LIFCell.py
@@ -5,7 +5,7 @@
 from ngclearn.components.jaxComponent import JaxComponent
 from ngclearn.utils.diffeq.ode_utils import get_integrator_code, \
                                             step_euler, step_rk2
-from ngclearn.utils.surrogate_fx import straight_through_estimator
+from ngclearn.utils.surrogate_fx import straight_through_estimator, triangular_estimator
 
 @jit
 def _update_times(t, s, tols):
@@ -237,7 +237,7 @@ def __init__(self, name, n_units, tau_m, resist_m=1., thr=-52., v_rest=-65.,
         self.n_units = n_units
 
         ## set up surrogate function for spike emission
-        self.spike_fx, self.d_spike_fx = straight_through_estimator()
+        self.spike_fx, self.d_spike_fx = triangular_estimator() # straight_through_estimator()
 
         ## Compartment setup
         restVals = jnp.zeros((self.batch_size, self.n_units))
diff --git a/ngclearn/utils/surrogate_fx.py b/ngclearn/utils/surrogate_fx.py
index 84677eee..3371829f 100644
--- a/ngclearn/utils/surrogate_fx.py
+++ b/ngclearn/utils/surrogate_fx.py
@@ -53,7 +53,6 @@ def d_spike_fx(v, thr):
         mask = (v < thr).astype(jnp.float32)
         dfx = mask * thr - (1. - mask) * thr
         return dfx
-        return dfx
     if get_surr_fx == True:
         return spike_fx, spike_fx, d_spike_fx
     else: