diff --git a/cmake/config.cmake.in b/cmake/config.cmake.in
index b4fd29d99..3ea43afb8 100644
--- a/cmake/config.cmake.in
+++ b/cmake/config.cmake.in
@@ -1,3 +1,4 @@
 @PACKAGE_INIT@
+set_and_check(JSON_INCLUDE_DIR "@NLOHMANN_JSON_HEADER_INSTALL_DIR@")
 include("${CMAKE_CURRENT_LIST_DIR}/@NLOHMANN_JSON_TARGETS_EXPORT_NAME@.cmake")
 check_required_components("@PROJECT_NAME@")