diff --git a/README.md b/README.md
index 9f3c2156fd8e329e17837ecb78b74fe185f1152f..92db3a2cb3f676b1f3579880b1da2a1bc67d1700 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Step by step instructions on using the charm:
 
 # Configuration
 
-    gateway CIDR of default gateway in /etc/network/interfaces. E.g.:  10.10.10.1/24
+    gateway IP or CIDR of default gateway in /etc/network/interfaces. E.g.:  10.10.10.1/24
 
 # Contact Information