1 files changed, 8 insertions, 1 deletions

diff --git a/crates/ra_lsp_server/src/req.rs b/crates/ra_lsp_server/src/req.rs
index dbc0e9624..39361b7e8 100644
--- a/crates/ra_lsp_server/src/req.rs
+++ b/crates/ra_lsp_server/src/req.rs
@@ -45,11 +45,18 @@ pub struct SyntaxTreeParams {
     pub range: Option<Range>,
 }
 
+#[derive(Serialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct ExpandedMacro {
+    pub name: String,
+    pub expansion: String,
+}
+
 pub enum ExpandMacro {}
 
 impl Request for ExpandMacro {
     type Params = ExpandMacroParams;
-    type Result = Option<(String, String)>;
+    type Result = Option<ExpandedMacro>;
     const METHOD: &'static str = "rust-analyzer/expandMacro";
 }