diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6680eaee..c0a0ab62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 
 ### Fixed
 - Fixed `unrecognized modifier 'i'` that happened on tab-completion when using sub command aliases ([#500](https://github.com/ajalt/clikt/pull/500))
+- Make sure auto complete script works on zsh, fixing the error `complete:13: command not found: compdef` ([#499](https://github.com/ajalt/clikt/pull/499))
 
 ## 4.2.2
 ### Changed
diff --git a/clikt/src/commonMain/kotlin/com/github/ajalt/clikt/completion/BashCompletionGenerator.kt b/clikt/src/commonMain/kotlin/com/github/ajalt/clikt/completion/BashCompletionGenerator.kt
index cff27229..3034516c 100644
--- a/clikt/src/commonMain/kotlin/com/github/ajalt/clikt/completion/BashCompletionGenerator.kt
+++ b/clikt/src/commonMain/kotlin/com/github/ajalt/clikt/completion/BashCompletionGenerator.kt
@@ -38,7 +38,9 @@ internal object BashCompletionGenerator {
                 if (zsh) {
                     append(
                         """
-                    |autoload bashcompinit
+                    |autoload -Uz compinit
+                    |compinit
+                    |autoload -Uz bashcompinit
                     |bashcompinit
                     |
                     |