diff --git a/Docs/sphinx_documentation/source/BuildingAMReX.rst b/Docs/sphinx_documentation/source/BuildingAMReX.rst
index 831346765b9..43afa7c337b 100644
--- a/Docs/sphinx_documentation/source/BuildingAMReX.rst
+++ b/Docs/sphinx_documentation/source/BuildingAMReX.rst
@@ -464,10 +464,10 @@ The list of available options is reported in the :ref:`table <tab:cmakevar>` bel
    | AMReX_LINEAR_SOLVERS         |  Build AMReX linear solvers                     | YES                     | YES, NO               |
    +------------------------------+-------------------------------------------------+-------------------------+-----------------------+
    | AMReX_LINEAR_SOLVERS_INCFLO  |  Build AMReX linear solvers for incompressible  | YES                     | YES, NO               |
-   |                              |  flow                                           |                         |
+   |                              |  flow                                           |                         |                       |
    +------------------------------+-------------------------------------------------+-------------------------+-----------------------+
    | AMReX_LINEAR_SOLVERS_EM      |  Build AMReX linear solvers for electromagnetic | YES                     | YES, NO               |
-   |                              |  solvers                                        |                         |
+   |                              |  solvers                                        |                         |                       |
    +------------------------------+-------------------------------------------------+-------------------------+-----------------------+
    | AMReX_AMRDATA                |  Build data services                            | NO                      | YES, NO               |
    +------------------------------+-------------------------------------------------+-------------------------+-----------------------+
diff --git a/Src/Base/AMReX_CTOParallelForImpl.H b/Src/Base/AMReX_CTOParallelForImpl.H
index d4431d7899b..24f39893a18 100644
--- a/Src/Base/AMReX_CTOParallelForImpl.H
+++ b/Src/Base/AMReX_CTOParallelForImpl.H
@@ -22,8 +22,6 @@ struct CompileTimeOptions {
     using list_type = TypeList<std::integral_constant<int, ctr>...>;
 };
 
-#if (__cplusplus >= 201703L)
-
 namespace detail
 {
     template<class F, int... ctr>
@@ -76,8 +74,6 @@ namespace detail
     }
 }
 
-#endif
-
 /**
  * \brief Compile time optimization of kernels with run time options.
  *
@@ -184,15 +180,10 @@ void AnyCTO ([[maybe_unused]] TypeList<CTOs...> list_of_compile_time_options,
              std::array<int,sizeof...(CTOs)> const& runtime_options,
              L&& l, Fs&&...cto_functs)
 {
-#if (__cplusplus >= 201703L)
     detail::AnyCTO_helper1(std::forward<L>(l),
                            CartesianProduct(typename CTOs::list_type{}...),
                            runtime_options,
                            std::forward<Fs>(cto_functs)...);
-#else
-    amrex::ignore_unused(runtime_options, l, f);
-    static_assert(std::is_integral<F>::value, "This requires C++17");
-#endif
 }
 
 template <int MT, typename T, class F, typename... CTOs>