diff --git a/src/completions/zsh.rs b/src/completions/zsh.rs
index 8f926173..2b086996 100644
--- a/src/completions/zsh.rs
+++ b/src/completions/zsh.rs
@@ -31,6 +31,8 @@ impl<'a, 'b> ZshGen<'a, 'b> {
                 "\
 #compdef {name}
 
+autoload -U is-at-least
+
 _{name}() {{
     typeset -A opt_args
     typeset -a _arguments_options
diff --git a/tests/completions.rs b/tests/completions.rs
index 6eb25acc..862a9d12 100644
--- a/tests/completions.rs
+++ b/tests/completions.rs
@@ -89,6 +89,8 @@ complete -F _myapp -o bashdefault -o default myapp
 
 static ZSH: &'static str = r#"#compdef myapp
 
+autoload -U is-at-least
+
 _myapp() {
     typeset -A opt_args
     typeset -a _arguments_options
@@ -387,6 +389,8 @@ static POWERSHELL_SPECIAL_CMDS: &'static str = r#"
 
 static ZSH_SPECIAL_CMDS: &'static str = r#"#compdef my_app
 
+autoload -U is-at-least
+
 _my_app() {
     typeset -A opt_args
     typeset -a _arguments_options
@@ -673,6 +677,8 @@ complete -c my_app -n "__fish_using_command my_app" -s V -l version -d 'Prints v
 
 static ZSH_SPECIAL_HELP: &'static str = r#"#compdef my_app
 
+autoload -U is-at-least
+
 _my_app() {
     typeset -A opt_args
     typeset -a _arguments_options