diff --git a/pipeline/generateCatalog.py b/pipeline/generateCatalog.py
index 5abacb5..92428c7 100755
--- a/pipeline/generateCatalog.py
+++ b/pipeline/generateCatalog.py
@@ -16,8 +16,8 @@ def my_import(name):
         mod = getattr(mod, comp)
     return mod
 
-if (len(sys.argv) == 0):
-  print "Usage: ./anylyzeVoids.py parameter_file.py"
+if (len(sys.argv) == 1):
+  print "Usage: ./analyzeVoids.py parameter_file.py"
   exit(-1)
 
 if (len(sys.argv) > 1):