diff --git a/crates/ra_lsp_server/src/caps.rs b/crates/ra_lsp_server/src/caps.rs
index 4cb259360bd..e0bb756666e 100644
--- a/crates/ra_lsp_server/src/caps.rs
+++ b/crates/ra_lsp_server/src/caps.rs
@@ -24,7 +24,7 @@ pub fn server_capabilities() -> ServerCapabilities {
             work_done_progress_options: WorkDoneProgressOptions { work_done_progress: None },
         }),
         signature_help_provider: Some(SignatureHelpOptions {
-            trigger_characters: Some(vec!["(".to_string(), ",".to_string(), ")".to_string()]),
+            trigger_characters: Some(vec!["(".to_string(), ",".to_string()]),
             retrigger_characters: None,
             work_done_progress_options: WorkDoneProgressOptions { work_done_progress: None },
         }),