diff --git a/MANIFEST.in b/MANIFEST.in
index 79979e9af..f8c39abab 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -37,4 +37,13 @@ recursive-include PyMca5/PyMcaPlugins *.py
 recursive-include PyMca5/scripts *
 recursive-include PyMca5/tests *.py
 recursive-include third-party/qhull *.c *.h *.txt
+include third-party/fisx/MANIFEST.in
+include third-party/fisx/LICENSE
+include third-party/fisx/changelog.txt
+include third-party/fisx/README.md
+include third-party/fisx/README
+include third-party/fisx/TODO
+recursive-include third-party/fisx/fisx_data *.dat
+recursive-include third-party/fisx/python *.py *.pyx *.pxd *.cpp
+recursive-include third-party/fisx/src *.h *.cpp
 recursive-include scripts *.py *.bat