@@ -19,7 +19,7 @@ lg = log --pretty=format:'%Cred%h%Creset -%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset'
 	standup = log --pretty=format:'%Cred%h%Creset -%Creset %s %Cgreen(%ci) %C(bold blue)<%an>%Creset' --since yesterday --author Alan
 	ignored = ls-files --others -i --exclude-standard
 	pr = pull-request
-	delete-merged = '!sh git branch --merged | grep -v "\\*" | grep -v master | grep -v dev | xargs -n 1 git branch -d'
+	delete-merged = "!sh -c 'git branch --merged | grep -v "\\*" | grep -v master | grep -v dev | xargs -n 1 git branch -d'"
 [github]
 	user = alan@alanpearce.co.uk
 [diff]