diff --git a/MANIFEST.in b/MANIFEST.in
index f009ef7..631e6af 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -6,5 +6,6 @@ recursive-include include *.html
 recursive-include pyrfr *.pxd
 recursive-include pyrfr *.cpp
 recursive-include pyrfr *.pyx
+recursive-include pyrfr *.i
 
-CMakeList.txt
\ No newline at end of file
+CMakeList.txt