--- a/src/proto2/Physics.hh	Wed Nov 19 15:07:28 2008 +0000
+++ b/src/proto2/Physics.hh	Thu Nov 20 15:01:17 2008 +0000
@@ -3,11 +3,12 @@
 
 #include "Vector.hh"
 
+#include <vector>
 #include <ClanLib/core.h>
 
 const uint16_t PHYSICS_TICK_MS = 10;
 
-const enum TerrainType {EMPTY, DIRT, ROCK};
+enum TerrainType {EMPTY, DIRT, ROCK};
 
 // forward-declare
 class PhysicsObject;
@@ -23,7 +24,7 @@
     Vector gravity;
     Vector dimensions;
     
-    std::vector<std::vector> terrain;
+    std::vector<std::vector<TerrainType> > terrain;
 
     CL_SlotContainer slots;