1 files changed, 1 insertions, 1 deletions

diff --git a/common.py b/common.py
index a26ac94..66df7bb 100644
--- a/common.py
+++ b/common.py
@@ -7,7 +7,7 @@ import sys
 from collections import defaultdict
 from textwrap import dedent
 
-def get_executable(prog, hint, optional=False):
+def get_executable(prog, hint='unknown', optional=False):
     '''Search for @prog in system PATH. Print @hint if no binary is found.'''
 
     def is_exe(fpath):