diff --git a/nanorc.nanorc b/nanorc.nanorc
index b951127..a224372 100644
--- a/nanorc.nanorc
+++ b/nanorc.nanorc
@@ -15,3 +15,6 @@ icolor white ""(\\.|[^"])*""
 ## Comments
 icolor brightblue "^[[:space:]]*#.*$"
 icolor cyan "^[[:space:]]*##.*$"
+
+## Trailing whitespace
+icolor ,green "[[:space:]]+$"