diff --git a/docs/changelog.rst b/docs/changelog.rst
index e467dbc41..13e0373cf 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -30,6 +30,9 @@ Changelog
 
 - When drag-scrolling stop the scroll when the mouse button is released.
 
+- Fix a regression in the previous release that caused pasting large amounts
+  of text to be duplicated (:iss:`709`)
+
 
 0.11.2 [2018-07-01]
 ------------------------------
diff --git a/kitty/child-monitor.c b/kitty/child-monitor.c
index 65c6d19ce..96214febb 100644
--- a/kitty/child-monitor.c
+++ b/kitty/child-monitor.c
@@ -976,7 +976,12 @@ write_to_child(int fd, Screen *screen) {
             written = screen->write_buf_used;
         }
     }
-    screen->write_buf_used -= written;
+    if (written) {
+        screen->write_buf_used -= written;
+        if (screen->write_buf_used) {
+            memmove(screen->write_buf, screen->write_buf + written, screen->write_buf_used);
+        }
+    }
     screen_mutex(unlock, write);
 }