diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2519157..0673bbce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,7 +74,7 @@ file(GLOB_RECURSE BOOST_HTTP_PROTO_HEADERS CONFIGURE_DEPENDS
     include/boost/*.ipp
     include/boost/*.natvis
 )
-file(GLOB_RECURSE BOOST_HTTP_PROTO_SOURCES CONFIGURE_DEPENDS src/*.cpp)
+file(GLOB_RECURSE BOOST_HTTP_PROTO_SOURCES CONFIGURE_DEPENDS src/*.cpp src/*.hpp)
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)