diff --git a/Chapter5 - Generalizing Gradient Descent - Learning Multiple Weights at a Time.ipynb b/Chapter5 - Generalizing Gradient Descent - Learning Multiple Weights at a Time.ipynb
index f70b930..455ea5f 100644
--- a/Chapter5 - Generalizing Gradient Descent - Learning Multiple Weights at a Time.ipynb	
+++ b/Chapter5 - Generalizing Gradient Descent - Learning Multiple Weights at a Time.ipynb	
@@ -66,6 +66,9 @@
     "\n",
     "  \n",
     "\n",
+    "weight_deltas = ele_mul(delta,input)\n"
+    "\n",
+    "\n",
     "alpha = 0.01\n",
     "\n",
     "for i in range(len(weights)):\n",