diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab6c6d4c2d4..1af1ce81c4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Breaking change: Widget.notify and App.notify now return None https://github.com/Textualize/textual/pull/3275
 - App.unnotify is now private (renamed to App._unnotify) https://github.com/Textualize/textual/pull/3275
 - `Markdown.load` will now attempt to scroll to a related heading if an anchor is provided https://github.com/Textualize/textual/pull/3244
+- `ProgressBar` explicitly supports being set back to its indeterminate state https://github.com/Textualize/textual/pull/3285
 
 ## [0.36.0] - 2023-09-05
 
diff --git a/src/textual/widgets/_progress_bar.py b/src/textual/widgets/_progress_bar.py
index 617d3908924..b0500bd9895 100644
--- a/src/textual/widgets/_progress_bar.py
+++ b/src/textual/widgets/_progress_bar.py
@@ -276,7 +276,6 @@ class ProgressBar(Widget, can_focus=False):
     """The total number of steps associated with this progress bar, when known.
 
     The value `None` will render an indeterminate progress bar.
-    Once `total` is set to a numerical value, it cannot be set back to `None`.
     """
     percentage: reactive[float | None] = reactive[Optional[float]](None)
     """The percentage of progress that has been completed.
@@ -398,6 +397,7 @@ def advance(self, advance: float = 1) -> None:
             ```py
             progress_bar.advance(10)  # Advance 10 steps.
             ```
+
         Args:
             advance: Number of steps to advance progress by.
         """
diff --git a/tests/test_progress_bar.py b/tests/test_progress_bar.py
index 64b034817d4..17771e40585 100644
--- a/tests/test_progress_bar.py
+++ b/tests/test_progress_bar.py
@@ -78,9 +78,6 @@ def test_update_total():
     pb.update(total=1000)
     assert pb.total == 1000
 
-    pb.update(total=None)
-    assert pb.total == 1000
-
     pb.update(total=100)
     assert pb.total == 100
 
@@ -119,6 +116,15 @@ def test_update():
     assert pb.progress == 50
 
 
+def test_go_back_to_indeterminate():
+    pb = ProgressBar()
+
+    pb.total = 100
+    assert pb.percentage == 0
+    pb.total = None
+    assert pb.percentage is None
+
+
 @pytest.mark.parametrize(
     ["show_bar", "show_percentage", "show_eta"],
     [