diff --git a/completion/zsh/_installsystems b/completion/zsh/_installsystems
index 66158657fd108203e5398cf55c62a8de22b4531f..8988912ef38f766c36cd387e668a2e669cce269f 100644
--- a/completion/zsh/_installsystems
+++ b/completion/zsh/_installsystems
@@ -240,7 +240,7 @@ _is() {
                         ;;
                     (install)
                         args+=(
-                        "--dry-run:[doesn't execute setup scripts]"
+                        "--dry-run[doesn't execute setup scripts]"
                         '1:image:_installsystems_images'
                         '2:target:_files -/'
                         )