diff --git a/ucompile b/ucompile
index 0a3ff09..cc7fa1f 100755
--- a/ucompile
+++ b/ucompile
@@ -3,7 +3,7 @@ import argparse
 from os import system,popen
 from glob import glob
 
-def run_input_cases(program, verbose, output):
+def run_input_cases(program, verbose, output=False):
     input_files = glob("./*.in")
     if len(input_files) < 1: