diff --git a/conf.nanorc b/conf.nanorc
index 0cfb890..cf9f58a 100644
--- a/conf.nanorc
+++ b/conf.nanorc
@@ -7,3 +7,5 @@ icolor white ""(\\.|[^"])*""
 ## Comments
 icolor brightblue "^[[:space:]]*#.*$"
 icolor cyan "^[[:space:]]*##.*$"
+## Trailing spaces
+color ,green "[[:space:]]+$"