diff --git a/src/completions/zsh.rs b/src/completions/zsh.rs
index 8fbc1ff6..c73a9878 100644
--- a/src/completions/zsh.rs
+++ b/src/completions/zsh.rs
@@ -371,7 +371,7 @@ fn write_opts_of(p: &Parser) -> String {
         }
         if let Some(long) = o.long() {
             let l = format!(
-                "'{conflicts}{multiple}--{arg}+[{help}]{possible_values}' \\",
+                "'{conflicts}{multiple}--{arg}=[{help}]{possible_values}' \\",
                 conflicts = conflicts,
                 multiple = multiple,
                 arg = long,
diff --git a/tests/completions.rs b/tests/completions.rs
index 1afc6bcb..953b68c2 100644
--- a/tests/completions.rs
+++ b/tests/completions.rs
@@ -108,7 +108,7 @@ _myapp() {
         case $line[1] in
             (test)
 _arguments -s -S -C \
-'--case+[the case to test]' \
+'--case=[the case to test]' \
 '-h[Prints help information]' \
 '--help[Prints help information]' \
 '-V[Prints version information]' \
@@ -397,7 +397,7 @@ _my_app() {
         case $line[1] in
             (test)
 _arguments -s -S -C \
-'--case+[the case to test]' \
+'--case=[the case to test]' \
 '-h[Prints help information]' \
 '--help[Prints help information]' \
 '-V[Prints version information]' \
@@ -406,7 +406,7 @@ _arguments -s -S -C \
 ;;
 (some_cmd)
 _arguments -s -S -C \
-'--config+[the other case to test]' \
+'--config=[the other case to test]' \
 '-h[Prints help information]' \
 '--help[Prints help information]' \
 '-V[Prints version information]' \