diff --git a/MANIFEST.in b/MANIFEST.in
index 2d4b6e84e..e7eabe959 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,5 @@
 recursive-include include *.h
+recursive-include *.txt
 include LICENSE
 include README.md
 include pyproject.toml