diff --git a/libs/core/algorithms/include/hpx/parallel/util/loop.hpp b/libs/core/algorithms/include/hpx/parallel/util/loop.hpp
index 101e36ef34b2..875837316f8d 100644
--- a/libs/core/algorithms/include/hpx/parallel/util/loop.hpp
+++ b/libs/core/algorithms/include/hpx/parallel/util/loop.hpp
@@ -8,6 +8,7 @@
 
 #include <hpx/config.hpp>
 #include <hpx/assert.hpp>
+#include <hpx/concepts/concepts.hpp>
 #include <hpx/datastructures/tuple.hpp>
 #include <hpx/execution/traits/is_execution_policy.hpp>
 #include <hpx/functional/detail/invoke.hpp>