diff --git a/docs/mux-support.md b/docs/mux-support.md
index 3d0b876..820c99e 100644
--- a/docs/mux-support.md
+++ b/docs/mux-support.md
@@ -1,4 +1,4 @@
-## Mux Support
+# Mux Support
 
 In some hardware designs, multiple UARTS may be available behind a Mux, which
 requires obmc-console to select one at a time.