diff --git a/compiler/characterizer/functional.py b/compiler/characterizer/functional.py
index dad4fd96..35444b15 100644
--- a/compiler/characterizer/functional.py
+++ b/compiler/characterizer/functional.py
@@ -439,7 +439,7 @@ class functional(simulation):
                 measure_name = "V{0}_{1}ck{2}".format(dout_port, bit, check)
                 signal_name = "{0}_{1}".format(dout_port, bit)
                 voltage_value = self.stim.get_voltage(word[num_bits - bit - 1])
-                    
+
                 self.stim.add_comment("* CHECK {0} {1} = {2} time = {3}".format(signal_name,
                                                                                 measure_name,
                                                                                 voltage_value,
diff --git a/compiler/characterizer/stimuli.py b/compiler/characterizer/stimuli.py
index 0895d57e..d60cab85 100644
--- a/compiler/characterizer/stimuli.py
+++ b/compiler/characterizer/stimuli.py
@@ -246,7 +246,7 @@ class stimuli():
             # which is more accurate, but slower than the default trapezoid method
             # Do not remove this or it may not converge due to some "pa_00" nodes
             # unless you figure out what these are.
-            self.sf.write(".OPTIONS POST=1 RELTOL={0} PROBE method=gear\n".format(reltol))
+            self.sf.write(".OPTIONS POST=1 RELTOL={0} PROBE method=gear ACCT\n".format(reltol))
         elif OPTS.spice_name == "spectre":
             self.sf.write("simulator lang=spectre\n")
             if OPTS.use_pex: