--- a/test/CMakeLists.txt	2025-12-25 17:05:59.804507367 +0100
+++ b/test/CMakeLists.txt	2025-12-25 17:08:47.228585458 +0100
@@ -53,7 +53,7 @@
       endif()
         # Users may override the c++ standard:
         if(NOT DEFINED CMAKE_CXX_STANDARD OR "${CMAKE_CXX_STANDARD}" STREQUAL "")
-            if (ENABLE_XTL_COMPLEX)
+            if (TRUE)
                 CHECK_CXX_COMPILER_FLAG("-std=c++17" HAS_CPP17_FLAG)
                 if (NOT HAS_CPP17_FLAG)
                     message(FATAL_ERROR "Unsupported compiler -- xsimd requires C++17 support when xtl complex support is enabled")