diff --git a/smr/build-assembly-long.py b/smr/build-assembly-long.py
index 75373b9..cca7640 100644
--- a/smr/build-assembly-long.py
+++ b/smr/build-assembly-long.py
@@ -18,8 +18,10 @@ from smr.pins import pin_universes, make_stack
 
 # Define command-line options
 parser = argparse.ArgumentParser()
-parser.add_argument('-m', '--multipole', action='store_true',
-                    help='Whether to use multipole cross sections')
+parser.add_argument('--multipole', action='store_true',
+                    help='Use multipole cross sections')
+parser.add_argument('--no-multipole', action='store_false',
+                    help='Do not use multipole cross sections')
 parser.add_argument('-t', '--tallies', choices=('cell', 'mat'), default='mat',
                     help='Whether to use distribmats or distribcells for tallies')
 parser.add_argument('-a', '--axial', type=int, default=92,
@@ -27,6 +29,7 @@ parser.add_argument('-a', '--axial', type=int, default=92,
 parser.add_argument('-d', '--depleted', action='store_true',
                     help='Whether UO2 compositions should represent depleted fuel')
 parser.add_argument('-o', '--output-dir', type=Path, default=None)
+parser.set_defaults(multipole=True)
 args = parser.parse_args()
 
 # Make directory for inputs
diff --git a/smr/build-assembly-short.py b/smr/build-assembly-short.py
index 64999fc..c06c67b 100644
--- a/smr/build-assembly-short.py
+++ b/smr/build-assembly-short.py
@@ -17,8 +17,10 @@ from smr.pins import pin_universes
 
 # Define command-line options
 parser = argparse.ArgumentParser()
-parser.add_argument('-m', '--multipole', action='store_true',
-                    help='Whether to use multipole cross sections')
+parser.add_argument('--multipole', action='store_true',
+                    help='Use multipole cross sections')
+parser.add_argument('--no-multipole', action='store_false',
+                    help='Do not use multipole cross sections')
 parser.add_argument('-t', '--tallies', choices=('cell', 'mat'), default='mat',
                     help='Whether to use distribmats or distribcells for tallies')
 parser.add_argument('-a', '--axial', type=int, default=10,
@@ -26,6 +28,7 @@ parser.add_argument('-a', '--axial', type=int, default=10,
 parser.add_argument('-d', '--depleted', action='store_true',
                     help='Whether UO2 compositions should represent depleted fuel')
 parser.add_argument('-o', '--output-dir', type=Path, default=None)
+parser.set_defaults(multipole=True)
 args = parser.parse_args()
 
 # Make directory for inputs
diff --git a/smr/build-assembly.py b/smr/build-assembly.py
index e399b45..327f3bc 100644
--- a/smr/build-assembly.py
+++ b/smr/build-assembly.py
@@ -17,8 +17,10 @@ from smr import inlet_temperature
 
 # Define command-line options
 parser = argparse.ArgumentParser()
-parser.add_argument('-m', '--multipole', action='store_true',
-                    help='Whether to use multipole cross sections')
+parser.add_argument('--multipole', action='store_true',
+                    help='Use multipole cross sections')
+parser.add_argument('--no-multipole', action='store_false',
+                    help='Do not use multipole cross sections')
 parser.add_argument('-t', '--tallies', choices=('cell', 'mat'), default='mat',
                     help='Whether to use distribmats or distribcells for tallies')
 parser.add_argument('-r', '--rings', type=int, default=10,
@@ -28,6 +30,7 @@ parser.add_argument('-a', '--axial', type=int, default=196,
 parser.add_argument('-d', '--depleted', action='store_true',
                     help='Whether UO2 compositions should represent depleted fuel')
 parser.add_argument('-o', '--output-dir', type=Path, default=None)
+parser.set_defaults(multipole=True)
 args = parser.parse_args()
 
 # Make directory for inputs
diff --git a/smr/build-core-fresh.py b/smr/build-core-fresh.py
index caba492..1272f3b 100644
--- a/smr/build-core-fresh.py
+++ b/smr/build-core-fresh.py
@@ -25,8 +25,10 @@ def clone(mat):
 
 # Define command-line options
 parser = argparse.ArgumentParser()
-parser.add_argument('-m', '--multipole', action='store_true',
-                    help='Whether to use multipole cross sections')
+parser.add_argument('--multipole', action='store_true',
+                    help='Use multipole cross sections')
+parser.add_argument('--no-multipole', action='store_false',
+                    help='Do not use multipole cross sections')
 parser.add_argument('-t', '--tallies', choices=('cell', 'mat'), default='cell',
                     help='Whether to use distribmats or distribcells for tallies')
 parser.add_argument('-r', '--rings', type=int, default=10,
@@ -36,6 +38,7 @@ parser.add_argument('-a', '--axial', type=int, default=196,
 parser.add_argument('-d', '--depleted', action='store_true',
                     help='Whether UO2 compositions should represent depleted fuel')
 parser.add_argument('-o', '--output-dir', type=Path, default=None)
+parser.set_defaults(multipole=True)
 args = parser.parse_args()
 
 # Make directory for inputs