diff --git a/MANIFEST.in b/MANIFEST.in
index d85469db0b9a..7e6bd3404929 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -29,6 +29,7 @@ graft mypyc/doc
 
 # files necessary for testing sdist
 include mypy-requirements.txt
+include build-requirements.txt
 include test-requirements.txt
 include mypy_self_check.ini
 prune misc