diff --git a/CMakeLists.txt b/CMakeLists.txt
index 20c8907..accc1a2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -367,7 +367,7 @@ install(DIRECTORY
   "${CMAKE_CURRENT_LIST_DIR}/include/geos"
   "${CMAKE_CURRENT_BINARY_DIR}/include/geos"
   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-  FILES_MATCHING PATTERN "*.h")
+  FILES_MATCHING PATTERN "*.h" PATTERN "*.hpp")
 if(NOT DISABLE_GEOS_INLINE)
   install(DIRECTORY
     "${CMAKE_CURRENT_LIST_DIR}/include/geos"