Index: twisted/python/_twisted_zsh_stub
===================================================================
--- twisted/python/_twisted_zsh_stub	(revision 14988)
+++ twisted/python/_twisted_zsh_stub	(working copy)
@@ -30,7 +30,7 @@
 
 function load_twisted_completions() {
     [[ -z $commands[twistd] ]] && echo 'ERROR: test command "twistd" not found in path' && return 1
-    shebang=$(head -1 $commands[twistd])
+    shebang=$(head -n1 $commands[twistd])
     [[ $shebang != \#\!* ]] && echo 'ERROR: invalid shebang line for test script "twistd"' && return 1
     PYTHON=$shebang[3,-1]