diff --git a/packages/utils/src/assertDefined.ts b/packages/utils/src/assertDefined.ts
new file mode 100644
index 00000000000..0f2146afbfc
--- /dev/null
+++ b/packages/utils/src/assertDefined.ts
@@ -0,0 +1,8 @@
+export function assertDefined<T>(
+  value: T,
+  message = 'Expected value to be defined',
+): asserts value is NonNullable<T> {
+  if (value === undefined || value === null) {
+    throw new Error(message);
+  }
+}