diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index e96d178..0c86dc1 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -190,7 +190,7 @@
     // frequency of 30fps??
     var now = Date.now();
     var diff = now - this.last;
-    diff = (diff * 30) / 1000;
+    diff = (diff * PIXI.INTERACTION_FREQUENCY ) / 1000;
     if(diff < 1)return;
     this.last = now;
     //

diff --git a/src/pixi/InteractionManager.js b/src/pixi/InteractionManager.js
index e96d178..0c86dc1 100644
--- a/src/pixi/InteractionManager.js
+++ b/src/pixi/InteractionManager.js
@@ -190,7 +190,7 @@
     // frequency of 30fps??
     var now = Date.now();
     var diff = now - this.last;
-    diff = (diff * 30) / 1000;
+    diff = (diff * PIXI.INTERACTION_FREQUENCY ) / 1000;
     if(diff < 1)return;
     this.last = now;
     //
diff --git a/src/pixi/Pixi.js b/src/pixi/Pixi.js
index 79bf046..b0220bd 100644
--- a/src/pixi/Pixi.js
+++ b/src/pixi/Pixi.js
@@ -40,3 +40,6 @@
     LINEAR:0,
     NEAREST:1
 };
+
+// interaction frequancy 
+PIXI.INTERACTION_FREQUENCY = 30;
\ No newline at end of file