diff --git a/sls.nanorc b/sls.nanorc
index bd78d6a..c8affff 100644
--- a/sls.nanorc
+++ b/sls.nanorc
@@ -24,3 +24,6 @@ color brightblack "^#.*"
 
 # Logic keywords
 color magenta "\<(if|elif|else|or|not|and|endif|end)\>"
+
+## Trailing spaces
+color ,green "[[:space:]]+$"