diff --git a/modules/sed.py b/modules/sed.py
index 523448c..560a6ca 100755
--- a/modules/sed.py
+++ b/modules/sed.py
@@ -38,6 +38,8 @@ def collectlines(bot, trigger):
 def findandreplace(bot, trigger):
 	if trigger.is_privmsg:
 		return
+	if not trigger.args[0]:
+		return
 	if not trigger.args[0].startswith('s') and trigger.args[0][-1] not in ':,':
 		return
 	line = ' '.join(trigger.args)