diff --git a/crates/rust-analyzer/src/config.rs b/crates/rust-analyzer/src/config.rs
index 617612dc3a..1253db8361 100644
--- a/crates/rust-analyzer/src/config.rs
+++ b/crates/rust-analyzer/src/config.rs
@@ -241,15 +241,8 @@ impl Config {
                         set(value, "/checkOnSave/extraArgs", extra_args);
                         set(value, "/checkOnSave/command", command);
                         set(value, "/checkOnSave/allTargets", all_targets);
-                        if let Some(new_all_features) = get(value, "/checkOnSave/allFeatures") {
-                            *all_features = new_all_features;
-                        } else {
-                            *all_features = self.cargo.all_features;
-                        }
-                        set(value, "/checkOnSave/features", features);
-                        if features.is_empty() && !self.cargo.features.is_empty() {
-                            *features = self.cargo.features.clone();
-                        }
+                        *all_features = get(value, "/checkOnSave/allFeatures").unwrap_or(self.cargo.all_features);
+                        *features = get(value, "/checkOnSave/features").unwrap_or(self.cargo.features.clone());
                     }
                 }
             };
diff --git a/editors/code/package.json b/editors/code/package.json
index 647c83685b..e2027970db 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -326,11 +326,14 @@
                     "markdownDescription": "Check with all features (will be passed as `--all-features`). Defaults to `rust-analyzer.cargo.allFeatures`."
                 },
                 "rust-analyzer.checkOnSave.features": {
-                    "type": "array",
+                    "type": [
+                        "null",
+                        "array"
+                    ],
                     "items": {
                         "type": "string"
                     },
-                    "default": [],
+                    "default": null,
                     "description": "List of features to activate. Defaults to `rust-analyzer.cargo.features`."
                 },
                 "rust-analyzer.inlayHints.enable": {