diff --git a/crates/rust-analyzer/src/config/patch_old_style.rs b/crates/rust-analyzer/src/config/patch_old_style.rs
index 472e2e0eee..3b174a7193 100644
--- a/crates/rust-analyzer/src/config/patch_old_style.rs
+++ b/crates/rust-analyzer/src/config/patch_old_style.rs
@@ -116,7 +116,7 @@ pub(super) fn patch_json_for_outdated_configs(json: &mut Value) {
         copy.pointer("/completion/addCallParenthesis"),
     ) {
         (Some(Value::Bool(true)), Some(Value::Bool(true))) => json!("fill_arguments"),
-        (Some(Value::Bool(true)), _) => json!("add_parentheses"),
+        (_, Some(Value::Bool(true))) => json!("add_parentheses"),
         (Some(Value::Bool(false)), Some(Value::Bool(false))) => json!("none"),
         (_, _) => return,
     };