diff --git a/stl/src/vector_algorithms.cpp b/stl/src/vector_algorithms.cpp
index 08030b214c1..c803267021d 100644
--- a/stl/src/vector_algorithms.cpp
+++ b/stl/src/vector_algorithms.cpp
@@ -6999,7 +6999,6 @@ namespace {
             }
 
             if (_Size_bits > 0) {
-                __assume(_Size_bits < sizeof(typename _Traits::_Value_type));
                 typename _Traits::_Value_type _Val;
                 memcpy(&_Val, _Src, sizeof(_Val));
                 const auto _Elems = _Traits::_Step(_Val, _Px0, _Px1);