diff --git a/MANIFEST.in b/MANIFEST.in
index ea270a93de55ffe6f024aeb348af0ec54a54f2e6..19814bd7305c3775b123bf7b74ef09a6d714d250 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,7 +1,7 @@
 include *.md
 include LICENSE
 include CONTRIBUTING.md
-include postpic/*.pyx
+include postpic/particles/*.pyx
 include _version.txt
 include postpic/_version.txt
 include versioneer.py