diff --git a/analysis.py b/analysis.py
index a98e334..ab33355 100755
--- a/analysis.py
+++ b/analysis.py
@@ -12,7 +12,7 @@ def calc_utilization(tasks):
 def main():
     parser = argparse.ArgumentParser(description='Generate plotable results from the experiments.')
     parser.add_argument('results', type=str, nargs='+', help='file containing experiment results.')
-    parser.add_argument('analysis', type=str, nargs='+', help='name identifying the analysis results.')
+    parser.add_argument('analysis', type=str, nargs=1, help='name identifying the analysis results.')
 
     args = parser.parse_args()