diff --git a/MANIFEST.in b/MANIFEST.in
index 9ed7928..885bb8b 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,7 +1,9 @@
 recursive-include csrc *.cu
 recursive-include csrc *.h
+recursive-include csrc *.cuh
 recursive-include csrc *.cpp
 
 recursive-include flash_attn *.cu
 recursive-include flash_attn *.h
+recursive-include flash_attn *.cuh
 recursive-include flash_attn *.cpp