diff --git a/subnets.html b/subnets.html
index b77ab14..38e756d 100644
--- a/subnets.html
+++ b/subnets.html
@@ -370,7 +370,7 @@ function network_address(ip, mask)
 
 function subnet_addresses(mask)
 {
-  return 1<<(32-mask);
+  return 2**(32-mask);
 }
 
 function subnet_last_address(subnet, mask)