diff --git a/xml.nanorc b/xml.nanorc
index 47542c6..8ad5a32 100644
--- a/xml.nanorc
+++ b/xml.nanorc
@@ -9,3 +9,6 @@ color cyan   ">"
 color yellow start="<!DOCTYPE" end="[/]?>"
 color yellow start="<!--" end="-->"
 color red    "&[^;]*;"
+
+## Trailing spaces
+color ,green "[[:space:]]+$"