diff --git a/doc/Extensions/MIB-based-polling.md b/doc/Extensions/MIB-based-polling.md
index 3d11bc1bc7..d23d207dd6 100644
--- a/doc/Extensions/MIB-based-polling.md
+++ b/doc/Extensions/MIB-based-polling.md
@@ -1,4 +1,4 @@
-RNING ##
+## WARNING ##
 
 MIB-based polling is experimental.  It might overload your LibreNMS server,
 destroy your data, set your routers on fire, and kick your cat.  It has been