diff --git a/crates/rust-analyzer/src/cli/load_cargo.rs b/crates/rust-analyzer/src/cli/load_cargo.rs
index 75bad1112bff..8cee6547878d 100644
--- a/crates/rust-analyzer/src/cli/load_cargo.rs
+++ b/crates/rust-analyzer/src/cli/load_cargo.rs
@@ -4,6 +4,7 @@ use std::{path::Path, sync::Arc};
 
 use anyhow::Result;
 use crossbeam_channel::{unbounded, Receiver};
+use hir::db::DefDatabase;
 use ide::{AnalysisHost, Change};
 use ide_db::base_db::CrateGraph;
 use project_model::{
@@ -94,6 +95,8 @@ fn load_crate_graph(
     let mut host = AnalysisHost::new(lru_cap);
     let mut analysis_change = Change::new();
 
+    host.raw_database_mut().set_enable_proc_attr_macros(true);
+
     // wait until Vfs has loaded all roots
     for task in receiver {
         match task {