diff --git a/src/tileset.cpp b/src/tileset.cpp
index fca7c2d3..a0443771 100644
--- a/src/tileset.cpp
+++ b/src/tileset.cpp
@@ -27,7 +27,6 @@ class TileSetData
 
 private:
     char *name;
-    int ref;
     int *tiles;
     int ntiles;
 
@@ -43,7 +42,6 @@ TileSet::TileSet(char const *path)
 {
     data = new TileSetData();
     data->name = strdup(path);
-    data->ref = 0;
     data->tiles = NULL;
     data->ntiles = 0;
     data->img = NULL;
@@ -77,16 +75,6 @@ TileSet::~TileSet()
     delete data;
 }
 
-void TileSet::Ref()
-{
-    data->ref++;
-}
-
-int TileSet::Unref()
-{
-    return --data->ref;
-}
-
 char const *TileSet::GetName()
 {
     return data->name;
diff --git a/src/tileset.h b/src/tileset.h
index 9adadc8a..b27908be 100644
--- a/src/tileset.h
+++ b/src/tileset.h
@@ -8,17 +8,16 @@
 
 #include <stdint.h>
 
+#include "asset.h"
+
 class TileSetData;
 
-class TileSet
+class TileSet : public Asset
 {
 public:
     TileSet(char const *path);
     ~TileSet();
 
-    void Ref();
-    int Unref();
-
     char const *GetName();
 
     void BlitTile(uint32_t id, int x, int y);