diff --git a/src/core/Buffer.h b/src/core/Buffer.h
index 7fa2e9c..27ca7a6 100644
--- a/src/core/Buffer.h
+++ b/src/core/Buffer.h
@@ -21,10 +21,6 @@ public:
         return std::make_shared<Cursor>(&*m_gap_buffer, m_encoding);
     }
     auto get_string() { return m_gap_buffer->get_string(); }
-    void insert(Cursor & insert_cursor, uint32_t code_point)
-    {
-        m_gap_buffer->insert(insert_cursor, code_point);
-    }
 
 protected:
     bool m_eol_at_eof;
diff --git a/src/core/GapBuffer.cc b/src/core/GapBuffer.cc
index c560788..8dd2d4e 100644
--- a/src/core/GapBuffer.cc
+++ b/src/core/GapBuffer.cc
@@ -1,7 +1,6 @@
 #include "GapBuffer.h"
 #include "System.h"
 #include <string.h>
-#include "Cursor.h"
 
 GapBuffer::GapBuffer(Encoding::Type encoding)
 {
@@ -40,12 +39,11 @@ void GapBuffer::compact()
 /**
  * Insert code_point into the gap buffer at position position.
  *
- * @param insert_cursor Cursor in the gap buffer to insert the code point at.
+ * @param position Position in the gap buffer to insert the code point at.
  * @param code_point The code point to insert.
  */
-void GapBuffer::insert(Cursor & insert_cursor, uint32_t code_point)
+void GapBuffer::insert(size_t position, uint32_t code_point)
 {
-    size_t position = insert_cursor.iterator().offset();
     check_grow();
     move_gap(position);
     size_t size = Encoding::encode(code_point, m_encoding, &m_buffer[m_gap_position]);
diff --git a/src/core/GapBuffer.h b/src/core/GapBuffer.h
index 53dd372..a61278b 100644
--- a/src/core/GapBuffer.h
+++ b/src/core/GapBuffer.h
@@ -8,8 +8,6 @@
 #include <list>
 #include <string>
 
-class Cursor;
-
 class GapBuffer
 {
 public:
@@ -33,7 +31,7 @@ public:
     }
     size_t gap_size() const { return m_buffer_size - m_size; }
     void compact();
-    void insert(Cursor & insert_cursor, uint32_t code_point);
+    void insert(size_t position, uint32_t code_point);
     std::string get_string();
     Encoding::Type encoding() { return m_encoding; }