diff --git a/conf.org b/conf.org
index 84c10ba..02ffbb4 100644
--- a/conf.org
+++ b/conf.org
@@ -1920,8 +1920,7 @@ Signatures take lots of space and make short messages look needlessly clunky, so
 (setq mu4e-compose-signature-auto-include nil
 
 	  mu4e-compose-signature
-	  (mapconcat
-	   'identity
+	  (string-join
 	   '("Nate Dwarshuis"
 		 ""
 		 "PhD Student - Biomedical Engineering - Krish Roy Lab"