diff --git a/crates/ra_lsp_server/src/caps.rs b/crates/ra_lsp_server/src/caps.rs
index a74f9f27b6..2599a4ca60 100644
--- a/crates/ra_lsp_server/src/caps.rs
+++ b/crates/ra_lsp_server/src/caps.rs
@@ -37,7 +37,7 @@ pub fn server_capabilities() -> ServerCapabilities {
         document_range_formatting_provider: None,
         document_on_type_formatting_provider: Some(DocumentOnTypeFormattingOptions {
             first_trigger_character: "=".to_string(),
-            more_trigger_character: None,
+            more_trigger_character: Some(vec![".".to_string()]),
         }),
         folding_range_provider: Some(FoldingRangeProviderCapability::Simple(true)),
         rename_provider: Some(RenameProviderCapability::Options(RenameOptions {