diff --git a/MANIFEST.in b/MANIFEST.in
index 9248857..63250c7 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,6 @@
 include README.rst
 include fastFM/ffm.c
+include fastFM/ffm.pxy
 recursive-include fastFM-core/include *
 include fastFM-core/bin/libfastfm.a
 include fastFM-core/externals/CXSparse/Lib/libcxsparse.a