diff --git a/yaml.nanorc b/yaml.nanorc
index b079c72..f202cd8 100644
--- a/yaml.nanorc
+++ b/yaml.nanorc
@@ -19,3 +19,6 @@ color brightwhite ":(\s|\t|$)"
 
 # Comments
 color brightblue "(^|[[:space:]])#.*$"
+
+# Trailing whitespace
+color ,red "[[:space:]]+$"