diff --git a/src/filters/displacement/DisplacementFilter.js b/src/filters/displacement/DisplacementFilter.js
index 6ffb10f..a6b4dce 100644
--- a/src/filters/displacement/DisplacementFilter.js
+++ b/src/filters/displacement/DisplacementFilter.js
@@ -12,7 +12,7 @@
  * @memberof PIXI.filters
  * @param sprite {Sprite} the sprite used for the displacement map. (make sure its added to the scene!)
  */
-function DisplacementFilter(sprite)
+function DisplacementFilter(sprite, scale)
 {
     var maskMatrix = new core.Matrix();
     sprite.renderable = false;
@@ -33,9 +33,13 @@
     this.maskSprite = sprite;
     this.maskMatrix = maskMatrix;
 
+    if (scale === 0) {
+        console.warn('Pixi.js DisplacementFilter warning: given scale is 0, the displacement filter would have no effect');
+    } else if (scale === null || scale === undefined) {
+        scale = 20;
+    }
 
-    this.scale = new core.Point(20,20);
-
+    this.scale = new core.Point(scale, scale);
 }
 
 DisplacementFilter.prototype = Object.create(core.AbstractFilter.prototype);

diff --git a/src/filters/displacement/DisplacementFilter.js b/src/filters/displacement/DisplacementFilter.js
index 6ffb10f..a6b4dce 100644
--- a/src/filters/displacement/DisplacementFilter.js
+++ b/src/filters/displacement/DisplacementFilter.js
@@ -12,7 +12,7 @@
  * @memberof PIXI.filters
  * @param sprite {Sprite} the sprite used for the displacement map. (make sure its added to the scene!)
  */
-function DisplacementFilter(sprite)
+function DisplacementFilter(sprite, scale)
 {
     var maskMatrix = new core.Matrix();
     sprite.renderable = false;
@@ -33,9 +33,13 @@
     this.maskSprite = sprite;
     this.maskMatrix = maskMatrix;
 
+    if (scale === 0) {
+        console.warn('Pixi.js DisplacementFilter warning: given scale is 0, the displacement filter would have no effect');
+    } else if (scale === null || scale === undefined) {
+        scale = 20;
+    }
 
-    this.scale = new core.Point(20,20);
-
+    this.scale = new core.Point(scale, scale);
 }
 
 DisplacementFilter.prototype = Object.create(core.AbstractFilter.prototype);
diff --git a/src/filters/displacement/displacement.frag b/src/filters/displacement/displacement.frag
index 94cdb41..3850c1a 100644
--- a/src/filters/displacement/displacement.frag
+++ b/src/filters/displacement/displacement.frag
@@ -11,7 +11,6 @@
 
 void main(void)
 {
-   vec4 original =  texture2D(uSampler, vTextureCoord);
    vec4 map =  texture2D(mapSampler, vMapCoord);
 
    map -= 0.5;