diff --git a/mcom b/mcom
index 63a0894..15bba03 100755
--- a/mcom
+++ b/mcom
@@ -145,7 +145,7 @@ fi
 		cat "$MBLAZE/headers" 2>/dev/null
 		mid=$(mhdr -h message-id "$1")
 		if [ "$mid" ]; then
-			printf 'References: '
+			printf 'References:'
 			{
 				mhdr -h references "$1"
 				printf '%s\n' "$mid"