diff --git a/lib/sproxyd.js b/lib/sproxyd.js
index 67300ea..3e9ea72 100644
--- a/lib/sproxyd.js
+++ b/lib/sproxyd.js
@@ -81,7 +81,7 @@ class SproxydClient {
         this.bootstrap = opts.bootstrap === undefined
             ? [['localhost', '81']] : _parseBootstrapList(opts.bootstrap);
         this.bootstrap = shuffle(this.bootstrap);
-        if (options.chordCos) {
+        if (options.chordCos !== undefined && options.chordCos !== null) {
             this.cos = options.chordCos;
             this.path = options.path || '/proxy/chord/';
         } else {
diff --git a/package.json b/package.json
index 5493a54..61849f7 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "engines": {
     "node": ">=20"
   },
-  "version": "8.2.0",
+  "version": "8.2.1",
   "description": "sproxyd client",
   "main": "index.js",
   "scripts": {
diff --git a/tests/unit/sproxyd.js b/tests/unit/sproxyd.js
index 0d9d780..fbe7ec8 100644
--- a/tests/unit/sproxyd.js
+++ b/tests/unit/sproxyd.js
@@ -374,6 +374,38 @@ const clientImmutableWithFailover = new Sproxy({
     });
 });
 
+describe('Sproxyd constructor chordCos', () => {
+    it('should default to cos 2 when chordCos is absent', () => {
+        const c = new Sproxy({ bootstrap: ['127.0.0.1:9000'] });
+        assert.strictEqual(c.cos, 0x2);
+    });
+
+    it('should default to cos 2 when chordCos is undefined', () => {
+        const c = new Sproxy({ bootstrap: ['127.0.0.1:9000'], chordCos: undefined });
+        assert.strictEqual(c.cos, 0x2);
+    });
+
+    it('should default to cos 2 when chordCos is null', () => {
+        const c = new Sproxy({ bootstrap: ['127.0.0.1:9000'], chordCos: null });
+        assert.strictEqual(c.cos, 0x2);
+    });
+
+    it('should set cos 0 when chordCos is 0 (integer)', () => {
+        const c = new Sproxy({ bootstrap: ['127.0.0.1:9000'], chordCos: 0 });
+        assert.strictEqual(c.cos, 0);
+    });
+
+    it('should set cos "0" when chordCos is "0" (string)', () => {
+        const c = new Sproxy({ bootstrap: ['127.0.0.1:9000'], chordCos: '0' });
+        assert.strictEqual(c.cos, '0');
+    });
+
+    it('should set cos when chordCos is a non-zero integer', () => {
+        const c = new Sproxy({ bootstrap: ['127.0.0.1:9000'], chordCos: 3 });
+        assert.strictEqual(c.cos, 3);
+    });
+});
+
 describe('Sproxyd client', () => {
     const client = new Sproxy({ bootstrap: ['127.0.0.1:9000'] });
     clientAssert(client.bootstrap, client.path);