diff --git a/ethermess.py b/ethermess.py
index 9944cfc..75bb2a1 100644
--- a/ethermess.py
+++ b/ethermess.py
@@ -4,6 +4,7 @@ libexec_dir = __LIBEXECDIR__
 offline_timeout = 5 * 60
 
 import enum
+import os
 import select
 import subprocess
 import sys
@@ -517,7 +518,7 @@ def main():
 	global own_nick, own_status
 
 	if len(sys.argv) != 3:
-		print("Usage: %s interface nick" % sys.argv[0], file=sys.stderr)
+		print("Usage: %s interface nick" % os.path.basename(sys.argv[0]), file=sys.stderr)
 		sys.exit(1)
 
 	_, interface, own_nick = sys.argv