diff --git a/MANIFEST.in b/MANIFEST.in
index eba40c5de6..3e8f09de37 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -15,4 +15,3 @@ include launcher.c
 include msvc-build-launcher.cmd
 include pytest.ini
 include tox.ini
-exclude pyproject.toml  # Temporary workaround for #1644.