2 files changed, 4 insertions, 3 deletions
diff --git a/klm/search/vertex.hh b/klm/search/vertex.hh
index 10b3339b..ca9a4fcd 100644
--- a/klm/search/vertex.hh
+++ b/klm/search/vertex.hh
@@ -65,7 +65,7 @@ class VertexNode {
     }
 
     // Will be invalid unless this is a leaf.   
-    const History End() const { return end_; }
+    History End() const { return end_; }
 
     const VertexNode &operator[](size_t index) const {
       return *extend_[index];
@@ -124,7 +124,7 @@ class PartialVertex {
       return ret;
     }
 
-    const History End() const {
+    History End() const {
       return back_->End();
     }
 
@@ -141,7 +141,7 @@ class Vertex {
 
     PartialVertex RootPartial() const { return PartialVertex(root_); }
 
-    const History BestChild() const {
+    History BestChild() const {
       PartialVertex top(RootPartial());
       if (top.Empty()) {
         return History();
diff --git a/klm/search/vertex_generator.hh b/klm/search/vertex_generator.hh
index da563c2d..646b8189 100644
--- a/klm/search/vertex_generator.hh
+++ b/klm/search/vertex_generator.hh
@@ -4,6 +4,7 @@
 #include "search/edge.hh"
 #include "search/types.hh"
 #include "search/vertex.hh"
+#include "util/exception.hh"
 
 #include <boost/unordered_map.hpp>
 #include <boost/version.hpp>