diff --git a/c.nanorc b/c.nanorc
index 65e0e2d..e51c99b 100644
--- a/c.nanorc
+++ b/c.nanorc
@@ -39,4 +39,4 @@ color brightblue "//.*"
 color brightblue start="/\*" end="\*/"
 
 ## Trailing whitespace
-#color ,green "[[:space:]]+$"
+color ,green "[[:space:]]+$"