diff --git a/compiler/characterizer/__init__.py b/compiler/characterizer/__init__.py
index 281be78a..67e307df 100644
--- a/compiler/characterizer/__init__.py
+++ b/compiler/characterizer/__init__.py
@@ -34,7 +34,7 @@ if not OPTS.analytical_delay:
     else:
         (OPTS.spice_name, OPTS.spice_exe) = get_tool("spice", ["ngspice", "ngspice.exe", "hspice", "xa", "Xyce"])
 
-    if OPTS.spice_name == "Xyce":
+    if OPTS.spice_name in ["Xyce", "xyce"]:
         (OPTS.mpi_name, OPTS.mpi_exe) = get_tool("mpi", ["mpirun"])
         OPTS.hier_seperator = ":"
     else:
diff --git a/compiler/characterizer/charutils.py b/compiler/characterizer/charutils.py
index b25093a0..59ef3177 100644
--- a/compiler/characterizer/charutils.py
+++ b/compiler/characterizer/charutils.py
@@ -26,7 +26,7 @@ def parse_spice_list(filename, key):
         full_filename="{0}xa.meas".format(OPTS.openram_temp)
     elif OPTS.spice_name == "spectre":
         full_filename = os.path.join(OPTS.openram_temp, "delay_stim.measure")
-    elif OPTS.spice_name == "Xyce":
+    elif OPTS.spice_name in ["Xyce", "xyce"]:
         full_filename = os.path.join(OPTS.openram_temp, "spice_stdout.log")
     else:
         # ngspice/hspice using a .lis file
diff --git a/compiler/characterizer/stimuli.py b/compiler/characterizer/stimuli.py
index f49f636b..55bdfd09 100644
--- a/compiler/characterizer/stimuli.py
+++ b/compiler/characterizer/stimuli.py
@@ -271,7 +271,7 @@ class stimuli():
             self.sf.write(".OPTIONS POST=1 RUNLVL={0} PROBE\n".format(runlvl))
             self.sf.write(".OPTIONS PSF=1 \n")
             self.sf.write(".OPTIONS HIER_DELIM=1 \n")
-        elif OPTS.spice_name == "Xyce":
+        elif OPTS.spice_name in ["Xyce", "xyce"]:
             self.sf.write(".OPTIONS DEVICE TEMP={}\n".format(self.temperature))
             self.sf.write(".OPTIONS MEASURE MEASFAIL=1\n")
             self.sf.write(".TRAN {0}p {1}n\n".format(timestep, end_time))
@@ -318,7 +318,7 @@ class stimuli():
 
         # Adding a commented out supply for simulators where gnd and 0 are not global grounds.
         self.sf.write("\n*Nodes gnd and 0 are the same global ground node in ngspice/hspice/xa. Otherwise, this source may be needed.\n")
-        if OPTS.spice_name == "Xyce":
+        if OPTS.spice_name in ["Xyce", "xyce"]:
             self.sf.write("V{0} {0} {1} {2}\n".format(self.gnd_name, gnd_node_name, 0.0))
         else:
             self.sf.write("*V{0} {0} {1} {2}\n".format(self.gnd_name, gnd_node_name, 0.0))
@@ -358,7 +358,7 @@ class stimuli():
                                                            temp_stim,
                                                            OPTS.openram_temp)
             valid_retcode=0
-        elif OPTS.spice_name == "Xyce":
+        elif OPTS.spice_name in ["Xyce", "xyce"]:
             if OPTS.num_sim_threads > 1 and OPTS.mpi_name:
                 mpi_cmd = "{0} -np {1}".format(OPTS.mpi_exe,
                                                OPTS.num_sim_threads)