diff --git a/src/buffer.hh b/src/buffer.hh
index a0d19836..0c57f851 100644
--- a/src/buffer.hh
+++ b/src/buffer.hh
@@ -61,6 +61,8 @@ public:
     BufferIterator& operator++ ();
     BufferIterator& operator-- ();
 
+    void clamp(bool avoid_eol);
+
     bool is_begin() const;
     bool is_end() const;
     bool is_valid() const;
diff --git a/src/buffer_iterator.inl.hh b/src/buffer_iterator.inl.hh
index 56d7efa1..eb9d5bcb 100644
--- a/src/buffer_iterator.inl.hh
+++ b/src/buffer_iterator.inl.hh
@@ -28,6 +28,12 @@ inline bool BufferIterator::is_valid() const
               column() == m_buffer->m_lines.back().length()));
 }
 
+inline void BufferIterator::clamp(bool avoid_eol)
+{
+    assert(m_buffer);
+    m_coord = m_buffer->clamp(m_coord, avoid_eol);
+}
+
 inline bool BufferIterator::operator==(const BufferIterator& iterator) const
 {
     assert(m_buffer == iterator.m_buffer);