diff --git a/conanfile.py b/conanfile.py
index 339ef9126..2979b31a0 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -261,6 +261,7 @@ def generate(self):
             tc.cache_variables["MP_UNITS_BUILD_CXX_MODULES"] = True
         if self.options.import_std:
             tc.cache_variables["CMAKE_CXX_MODULE_STD"] = True
+            tc.cache_variables["MP_UNITS_BUILD_IMPORT_STD"] = True
             # Current experimental support according to `Help/dev/experimental.rst`
             tc.cache_variables[
                 "CMAKE_EXPERIMENTAL_CXX_IMPORT_STD"