Improve sentence grammar by adding 'an'
diff --git a/docs/exception-handling.md b/docs/exception-handling.md
index 409acd5..c931508 100644
--- a/docs/exception-handling.md
+++ b/docs/exception-handling.md
@@ -189,7 +189,7 @@
<!--- TEST-->
-If a coroutine encounters exception other than `CancellationException`, it cancels its parent with that exception.
+If a coroutine encounters an exception other than `CancellationException`, it cancels its parent with that exception.
This behaviour cannot be overridden and is used to provide stable coroutines hierarchies for
[structured concurrency](https://github.com/Kotlin/kotlinx.coroutines/blob/master/docs/composing-suspending-functions.md#structured-concurrency-with-async) which do not depend on
[CoroutineExceptionHandler] implementation.