diff --git a/MANIFEST.in b/MANIFEST.in
index 6d3ce3da03..08551542d3 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,6 @@
 include mmdet3d/.mim/model-index.yml
 include requirements/*.txt
+recursive-include mmdet3d/.mim/ops *.cpp *.cu *.h *.cc
 recursive-include mmdet3d/.mim/configs *.py *.yml
 recursive-include mmdet3d/.mim/tools *.sh *.py
 recursive-include mmdet3d/.mim/demo *.png *.jpg *.bin *.pkl *.py