diff --git a/src/clipper/clipper.cpp b/src/clipper/clipper.cpp
index cea2087d87..11f8663f73 100644
--- a/src/clipper/clipper.cpp
+++ b/src/clipper/clipper.cpp
@@ -1,8 +1,8 @@
 /*******************************************************************************
 *                                                                              *
 * Author    :  Angus Johnson                                                   *
-* Version   :  6.3.0                                                           *
-* Date      :  19 April 2015                                                   *
+* Version   :  6.4.0                                                           *
+* Date      :  2 July 2015                                                     *
 * Website   :  http://www.angusj.com                                           *
 * Copyright :  Angus Johnson 2010-2015                                         *
 *                                                                              *
@@ -1528,7 +1528,12 @@ void Clipper::InsertLocalMinimaIntoAEL(const cInt botY)
 
      if (rb)
      {
-       if(IsHorizontal(*rb)) AddEdgeToSEL(rb);
+       if (IsHorizontal(*rb))
+       {
+         AddEdgeToSEL(rb);
+         if (rb->NextInLML)
+           m_Scanbeam.push(rb->NextInLML->Top.y());
+       }
        else m_Scanbeam.push(rb->Top.y());
      }
 
diff --git a/src/clipper/clipper.hpp b/src/clipper/clipper.hpp
index 0fb20a78ef..d6bbbf8ec8 100644
--- a/src/clipper/clipper.hpp
+++ b/src/clipper/clipper.hpp
@@ -1,8 +1,8 @@
 /*******************************************************************************
 *                                                                              *
 * Author    :  Angus Johnson                                                   *
-* Version   :  6.3.0                                                           *
-* Date      :  19 April 2015                                                   *
+* Version   :  6.4.0                                                           *
+* Date      :  2 July 2015                                                     *
 * Website   :  http://www.angusj.com                                           *
 * Copyright :  Angus Johnson 2010-2015                                         *
 *                                                                              *