diff --git a/docs/source/user/cfunc.rst b/docs/source/user/cfunc.rst
index b06a78bb101..845dc96341a 100644
--- a/docs/source/user/cfunc.rst
+++ b/docs/source/user/cfunc.rst
@@ -172,7 +172,7 @@ For example::
       tmp = 0
       for i in range(n):
          tmp += base[i].i1 * base[i].f2 / base[i].d3
-         tmp += base[i].af4.sum()  # nested arrays are like normal numpy array
+         tmp += base[i].af4.sum()  # nested arrays are like normal NumPy arrays
       return tmp