diff --git a/include/armadillo_bits/arma_forward.hpp b/include/armadillo_bits/arma_forward.hpp
index f436d2d8..8b2f15d3 100644
--- a/include/armadillo_bits/arma_forward.hpp
+++ b/include/armadillo_bits/arma_forward.hpp
@@ -346,6 +346,7 @@ struct arma_nozeros_indicator : public arma_initmode_indicator<false> {};
 
 template<typename Dummy = int> struct injector_end_of_row {};
 
+// DEPRECATED: DO NOT USE IN NEW CODE
 static const injector_end_of_row<> endr = injector_end_of_row<>();
 //!< endr indicates "end of row" when using the << operator;
 //!< similar conceptual meaning to std::endl