diff --git a/doc/manual/parallel-computing.rst b/doc/manual/parallel-computing.rst
index 73fc17ad455c6..9f78ec08ce84c 100644
--- a/doc/manual/parallel-computing.rst
+++ b/doc/manual/parallel-computing.rst
@@ -302,7 +302,7 @@ the variables are read-only::
 
     a = randn(1000)
     @parallel (+) for i=1:100000
-      f(a[randi(end)])
+      f(a[rand(1:end)])
     end
 
 Here each iteration applies ``f`` to a randomly-chosen sample from a