diff --git a/docs/mkdocs/docs/integration/index.md b/docs/mkdocs/docs/integration/index.md
index bfa94ae8a2..2bbaa86041 100644
--- a/docs/mkdocs/docs/integration/index.md
+++ b/docs/mkdocs/docs/integration/index.md
@@ -13,6 +13,6 @@ using json = nlohmann::json;
 to the files you want to process JSON and set the necessary switches to enable C++11 (e.g., `-std=c++11` for GCC and
 Clang).
 
-You can further use file [`include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/include/nlohmann/json_fwd.hpp)
-for forward-declarations. The installation of `json_fwd.hpp` (as part of CMake's install step), can be achieved by
-setting `-DJSON_MultipleHeaders=ON`.
+You can further use file
+[`single_include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp)
+for forward declarations.