diff --git a/include/glaze/concepts/container_concepts.hpp b/include/glaze/concepts/container_concepts.hpp
index 97e2faa1b4..239afae005 100644
--- a/include/glaze/concepts/container_concepts.hpp
+++ b/include/glaze/concepts/container_concepts.hpp
@@ -280,7 +280,7 @@ namespace glz
          matrix.size()
       } -> std::convertible_to<int>;
    } && !range<T>;
-   
+
    // concept for the Eigen library: matrices and vectors
    template <class T>
    concept eigen_t = requires(T matrix) {