diff --git a/lib/pixi/deepzoom/tile.js b/lib/pixi/deepzoom/tile.js
index 4d0f781..79c8134 100644
--- a/lib/pixi/deepzoom/tile.js
+++ b/lib/pixi/deepzoom/tile.js
@@ -2,7 +2,7 @@
 const registeredTiles = new Map()
 const pendingTiles = new Map()
 /** Implements a baseTexture cache. The last textures are kept for reuse  */
-const keepTextures = 0
+let keepTextures = 0
 const keptTextures = []
 
 /** The current Tile implementation simply uses PIXI.Sprites.
@@ -56,6 +56,13 @@ export default class Tile extends PIXI.Sprite {
         return pendingTiles.has(url) && pendingTiles.get(url) > 0
     }
 
+    static isObsolete(url) {
+        if (registeredTiles.has(url) && registeredTiles.get(url) > 0) {
+            return false
+        }
+        return true
+    }
+
     /**
      * Removes the given url from pending urls.
      *
@@ -121,6 +128,7 @@ export default class Tile extends PIXI.Sprite {
         tiles.delete(this)
         if (tiles.size == 0) {
             registeredTiles.delete(this.url)
+            return 0
         }
         return tiles.size
     }
@@ -142,9 +150,8 @@ export default class Tile extends PIXI.Sprite {
             super.destroy(opts)
 
             while(keptTextures.length > keepTextures) {
-                let {url, texture} = keptTextures.shift()
-                let tiles = registeredTiles.get(url)
-                if (tiles.size > 0 && !Tile.isPending(url)) {
+                let {url, texture} = keptTextures.shift() 
+                if (Tile.isObsolete(url)) {
                     texture.destroy(true) // Destroy base as well
                     if (debug) console.log("Destroying texture and baseTexture", url)
                 }