diff --git a/matrix.js b/matrix.js
index 97c9c2d..1d510e0 100644
--- a/matrix.js
+++ b/matrix.js
@@ -104,8 +104,8 @@ proto.flush = function(t) {
   if(idx < 0) {
     return
   }
-  this._time.slice(0, idx)
-  this._components.slice(0, 16*idx)
+  this._time.splice(0, idx)
+  this._components.splice(0, 16*idx)
 }
 
 proto.lastT = function() {
@@ -195,4 +195,4 @@ function createMatrixCameraController(options) {
                0,0,1,0,
                0,0,0,1]
   return new MatrixCameraController(matrix)
-}
\ No newline at end of file
+}