diff --git a/Horde3D/Source/Horde3DEngine/egAnimation.cpp b/Horde3D/Source/Horde3DEngine/egAnimation.cpp
index f0695e2..45c3b99 100644
--- a/Horde3D/Source/Horde3DEngine/egAnimation.cpp
+++ b/Horde3D/Source/Horde3DEngine/egAnimation.cpp
@@ -14,6 +14,7 @@
 #include "egModules.h"
 #include "egCom.h"
 #include <cstring>
+#include <algorithm>
 
 #include "utDebug.h"
 
@@ -144,11 +145,11 @@ bool AnimationResource::load( const char *data, int size )
 	// Sort entities by name id
 	struct CompFunc
 	{
-		bool operator()( const AnimResEntity &a, const AnimResEntity &b ) const
+		static bool f( const AnimResEntity &a, const AnimResEntity &b )
 			{ return a.nameId < b.nameId; }
 	};
 	
-	std::sort( _entities.begin(), _entities.end(), CompFunc() );
+	std::sort( _entities.begin(), _entities.end(), CompFunc::f );
 	
 	return true;
 }