diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a05fc4..573e5ac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,6 +35,10 @@ xo_add_genfacet_all(xo-gc-genfacet-all)
 add_subdirectory(src/gc)
 add_subdirectory(utest)
 
+install(DIRECTORY idl/
+    DESTINATION share/${PROJECT_NAME}/idl
+    FILES_MATCHING PATTERN "*.json5")
+
 xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets)
 
 # ----------------------------------------------------------------