diff --git a/include/boost/container/vector.hpp b/include/boost/container/vector.hpp
index 4319e6b..06d2c3f 100644
--- a/include/boost/container/vector.hpp
+++ b/include/boost/container/vector.hpp
@@ -137,7 +137,7 @@ class vector_const_iterator
    {  right.m_ptr += off;  return right; }
 
    friend vector_const_iterator operator-(vector_const_iterator left, difference_type off) BOOST_CONTAINER_NOEXCEPT
-   {  left.m_ptr += off;  return left; }
+   {  left.m_ptr -= off;  return left; }
 
    friend difference_type operator-(const vector_const_iterator &left, const vector_const_iterator& right) BOOST_CONTAINER_NOEXCEPT
    {  return left.m_ptr - right.m_ptr;   }