diff --git a/src/helpers/dockPolicy.js b/src/helpers/dockPolicy.js
index 7a3702de6..af87417e4 100644
--- a/src/helpers/dockPolicy.js
+++ b/src/helpers/dockPolicy.js
@@ -10,7 +10,8 @@
 
 // Whether the Dock icon should be visible right now.
 // Returns null off macOS, where there is no Dock to act on.
-export function resolveDockVisibility({ platform, controlPanelVisible }) {
+export function resolveDockVisibility(params = {}) {
+  const { platform, controlPanelVisible } = params || {};
   if (platform !== "darwin") return null;
   return !!controlPanelVisible;
 }
diff --git a/test/helpers/dockPolicy.test.js b/test/helpers/dockPolicy.test.js
index 3b216f88c..cccdf6ec4 100644
--- a/test/helpers/dockPolicy.test.js
+++ b/test/helpers/dockPolicy.test.js
@@ -27,3 +27,12 @@ test("there is no Dock to act on outside macOS", async () => {
     assert.equal(resolveDockVisibility({ platform, controlPanelVisible: true }), null);
   }
 });
+
+test("handles nullish and missing parameter safely", async () => {
+  const { resolveDockVisibility } = await load();
+
+  assert.equal(resolveDockVisibility(), null);
+  assert.equal(resolveDockVisibility(null), null);
+  assert.equal(resolveDockVisibility(undefined), null);
+  assert.equal(resolveDockVisibility({}), null);
+});