diff --git a/packages/rxjs/src/internal/types.ts b/packages/rxjs/src/internal/types.ts
index bbb680342b..81d517baa6 100644
--- a/packages/rxjs/src/internal/types.ts
+++ b/packages/rxjs/src/internal/types.ts
@@ -191,7 +191,7 @@ export interface Observer<T> {
    * A callback function that gets called by the producer if and when it encountered a
    * problem of any kind. The errored value will be provided through the `err` parameter.
    * This callback can't be called more than one time, it can't be called if the
-   * `complete` callback function have been called previously, nor it can't be called if
+   * `complete` callback function has been called previously, nor it can't be called if
    * the consumer has unsubscribed.
    *
    * For more info, please refer to {@link guide/glossary-and-semantics#error this guide}.
@@ -201,7 +201,7 @@ export interface Observer<T> {
    * A callback function that gets called by the producer if and when it has no more
    * values to provide (by calling `next` callback function). This means that no error
    * has happened. This callback can't be called more than one time, it can't be called
-   * if the `error` callback function have been called previously, nor it can't be called
+   * if the `error` callback function has been called previously, nor it can't be called
    * if the consumer has unsubscribed.
    *
    * For more info, please refer to {@link guide/glossary-and-semantics#complete this guide}.