diff --git a/README.md b/README.md
index c85ac69..0e782ed 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ same name. For example, to call the function jk in jk.m:
 you would call:
 
     res = mlab.run_func('path/to/jk.m', {'arg1': 3, 'arg2': 5})
-    print(es['result'])
+    print(res['result'])
 
 This would print `8`.