1 files changed, 2 insertions, 0 deletions
diff --git a/js/Linear/DERIV.js b/js/Linear/DERIV.js
index d8b77628..700141a1 100644
--- a/js/Linear/DERIV.js
+++ b/js/Linear/DERIV.js
@@ -10,6 +10,7 @@ function DERIV() {
         exprs = [];
         gr_i = [];
         this.x = standard_define([2,2],model,exprs,gr_i);
+        return new BasicBlock(this.x);
     }
     DERIV.prototype.details = function DERIV() {
         return this.x;
@@ -18,5 +19,6 @@ function DERIV() {
     }
     DERIV.prototype.set = function DERIV() {
         this.x = arg1;
+        return new BasicBlock(this.x);
     }
 }