diff --git a/notebooks/2015-09-24-Ideal plastic Von Mises material.ipynb b/notebooks/2015-09-24-Ideal plastic Von Mises material.ipynb
index d01cc9c..012771e 100644
--- a/notebooks/2015-09-24-Ideal plastic Von Mises material.ipynb	
+++ b/notebooks/2015-09-24-Ideal plastic Von Mises material.ipynb	
@@ -172,7 +172,7 @@
     "end\n",
     "\n",
     "\"\"\"\n",
-    "Function for NLsolve. Inside this function are the functions where we want to find root.\n",
+    "Function for NLsolve. Inside this function are the equations which we want to find root.\n",
     "Ψ is the yield function below. Functions defined here:\n",
     "\n",
     "    dσ - C (dϵ - dλ*dΨ/dσ) = 0\n",