diff --git a/delegate/opaque/CMakeLists.txt b/delegate/opaque/CMakeLists.txt
index a82b75ae..d7aed37 100644
--- a/delegate/opaque/CMakeLists.txt
+++ b/delegate/opaque/CMakeLists.txt
@@ -40,6 +40,7 @@
         src/Split.hpp
         src/StridedSlice.hpp
         src/Transpose.hpp
+        src/UnidirectionalSequenceLstm.hpp
         src/Unpack.hpp)
 
 add_library(armnnOpaqueDelegateObject OBJECT ${armnnOpaqueDelegateObject_sources})