diff --git a/core/src/main/kotlin/net/corda/core/internal/FlowSafeSubscriber.kt b/core/src/main/kotlin/net/corda/core/internal/FlowSafeSubscriber.kt
index 6ce853d027..06b139ed76 100644
--- a/core/src/main/kotlin/net/corda/core/internal/FlowSafeSubscriber.kt
+++ b/core/src/main/kotlin/net/corda/core/internal/FlowSafeSubscriber.kt
@@ -65,7 +65,7 @@ class FlowSafeSubscriber<T>(actual: Subscriber<in T>) : SafeSubscriber<T>(actual
 
 /**
  * We throw [OnNextFailedException] to pass the exception back through the preceding [Subscriber] chain
- * without triggering any [SafeSubscriber.onError]s. Since we extending an [OnErrorNotImplementedException]
+ * without triggering any [SafeSubscriber.onError]s. Since we are extending an [OnErrorNotImplementedException]
  * the exception will be re-thrown at [Exceptions.throwOrReport].
  */
 @VisibleForTesting