diff --git a/crates/rust-analyzer/src/cargo_target_spec.rs b/crates/rust-analyzer/src/cargo_target_spec.rs
index 1ab72bd915..8a8b4a32cb 100644
--- a/crates/rust-analyzer/src/cargo_target_spec.rs
+++ b/crates/rust-analyzer/src/cargo_target_spec.rs
@@ -14,6 +14,7 @@ use crate::{global_state::GlobalStateSnapshot, Result};
 #[derive(Clone)]
 pub(crate) struct CargoTargetSpec {
     pub(crate) workspace_root: AbsPathBuf,
+    pub(crate) cargo_toml: AbsPathBuf,
     pub(crate) package: String,
     pub(crate) target: String,
     pub(crate) target_kind: TargetKind,
@@ -115,12 +116,17 @@ impl CargoTargetSpec {
             Some(it) => it,
             None => return Ok(None),
         };
+
+        let target_data = &cargo_ws[target];
+        let package_data = &cargo_ws[target_data.package];
         let res = CargoTargetSpec {
             workspace_root: cargo_ws.workspace_root().to_path_buf(),
-            package: cargo_ws.package_flag(&cargo_ws[cargo_ws[target].package]),
-            target: cargo_ws[target].name.clone(),
-            target_kind: cargo_ws[target].kind,
+            cargo_toml: package_data.manifest.clone(),
+            package: cargo_ws.package_flag(&package_data),
+            target: target_data.name.clone(),
+            target_kind: target_data.kind,
         };
+
         Ok(Some(res))
     }
 
diff --git a/crates/rust-analyzer/src/handlers.rs b/crates/rust-analyzer/src/handlers.rs
index 89c7fd2c7b..94e2bfa1bb 100644
--- a/crates/rust-analyzer/src/handlers.rs
+++ b/crates/rust-analyzer/src/handlers.rs
@@ -1422,19 +1422,15 @@ pub(crate) fn handle_open_cargo_toml(
 ) -> Result<Option<lsp_types::GotoDefinitionResponse>> {
     let _p = profile::span("handle_open_cargo_toml");
     let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
-    let maybe_cargo_spec = CargoTargetSpec::for_file(&snap, file_id)?;
-    if maybe_cargo_spec.is_none() {
-        return Ok(None);
-    }
 
-    let cargo_spec = maybe_cargo_spec.unwrap();
-    let cargo_toml_path = cargo_spec.workspace_root.join("Cargo.toml");
-    if !cargo_toml_path.exists() {
-        return Ok(None);
-    }
-    let cargo_toml_url = to_proto::url_from_abs_path(&cargo_toml_path);
-    let cargo_toml_location = Location::new(cargo_toml_url, Range::default());
-    let res = lsp_types::GotoDefinitionResponse::from(cargo_toml_location);
+    let cargo_spec = match CargoTargetSpec::for_file(&snap, file_id)? {
+        Some(it) => it,
+        None => return Ok(None),
+    };
+
+    let cargo_toml_url = to_proto::url_from_abs_path(&cargo_spec.cargo_toml);
+    let res: lsp_types::GotoDefinitionResponse =
+        Location::new(cargo_toml_url, Range::default()).into();
     Ok(Some(res))
 }