diff --git a/packages/react-devtools-shared/src/__tests__/utils-test.js b/packages/react-devtools-shared/src/__tests__/utils-test.js
index 94726312c3bfa..876aaa99f1ea9 100644
--- a/packages/react-devtools-shared/src/__tests__/utils-test.js
+++ b/packages/react-devtools-shared/src/__tests__/utils-test.js
@@ -470,5 +470,14 @@ function f() { }
         {},
       ]);
     });
+
+    it('formats nullish values', () => {
+      expect(formatConsoleArguments('This is the %s template', null)).toEqual([
+        'This is the null template',
+      ]);
+      expect(
+        formatConsoleArguments('This is the %s template', undefined),
+      ).toEqual(['This is the undefined template']);
+    });
   });
 });
diff --git a/packages/react-devtools-shared/src/backend/utils/formatConsoleArguments.js b/packages/react-devtools-shared/src/backend/utils/formatConsoleArguments.js
index a2d303e543ac0..eaf4170970ed4 100644
--- a/packages/react-devtools-shared/src/backend/utils/formatConsoleArguments.js
+++ b/packages/react-devtools-shared/src/backend/utils/formatConsoleArguments.js
@@ -58,7 +58,7 @@ export default function formatConsoleArguments(
       }
       case 's': {
         const [arg] = args.splice(argumentsPointer, 1);
-        template += arg.toString();
+        template += String(arg);
 
         break;
       }