diff --git a/website/source/docs/configuration/interpolation.html.md b/website/source/docs/configuration/interpolation.html.md
index 731925296..360c0bff8 100644
--- a/website/source/docs/configuration/interpolation.html.md
+++ b/website/source/docs/configuration/interpolation.html.md
@@ -157,7 +157,7 @@ The supported built-in functions are:
   * `cidrnetmask(iprange)` - Takes an IP address range in CIDR notation
     and returns the address-formatted subnet mask format that some
     systems expect for IPv4 interfaces. For example,
-    `cidrmask("10.0.0.0/8")` returns `255.0.0.0`. Not applicable
+    `cidrnetmask("10.0.0.0/8")` returns `255.0.0.0`. Not applicable
     to IPv6 networks since CIDR notation is the only valid notation for
     IPv4.