diff --git a/map/screen_coverage.cpp b/map/screen_coverage.cpp
index 9b4aea9ff9..c725536513 100644
--- a/map/screen_coverage.cpp
+++ b/map/screen_coverage.cpp
@@ -159,11 +159,6 @@ void ScreenCoverage::Remove(Tile const *)
 {
 }
 
-bool LessRectInfo::operator()(Tile const * l, Tile const * r) const
-{
-  return l->m_rectInfo < r->m_rectInfo;
-}
-
 void ScreenCoverage::SetScreen(ScreenBase const & screen)
 {
   m_screen = screen;
diff --git a/map/screen_coverage.hpp b/map/screen_coverage.hpp
index da72217b6a..718f3b34dc 100644
--- a/map/screen_coverage.hpp
+++ b/map/screen_coverage.hpp
@@ -23,11 +23,6 @@ namespace yg
 
 class CoverageGenerator;
 
-struct LessRectInfo
-{
-  bool operator()(Tile const * l, Tile const * r) const;
-};
-
 class ScreenCoverage
 {
 private:
diff --git a/map/tile.cpp b/map/tile.cpp
index 9bdc1ae5cf..c5c31b75b1 100644
--- a/map/tile.cpp
+++ b/map/tile.cpp
@@ -23,3 +23,8 @@ Tile::Tile(shared_ptr<yg::gl::BaseTexture> const & renderTarget,
 
 Tile::~Tile()
 {}
+
+bool LessRectInfo::operator()(Tile const * l, Tile const * r) const
+{
+  return l->m_rectInfo < r->m_rectInfo;
+}
diff --git a/map/tile.hpp b/map/tile.hpp
index 0fdb929a51..775fd1b22b 100644
--- a/map/tile.hpp
+++ b/map/tile.hpp
@@ -36,3 +36,9 @@ struct Tile
 
   ~Tile();
 };
+
+struct LessRectInfo
+{
+  bool operator()(Tile const * l, Tile const * r) const;
+};
+