diff --git a/extras/conf/udb/Includes/SRB222_linedefs.cfg b/extras/conf/udb/Includes/SRB222_linedefs.cfg
index 1043c3bf2..267e52845 100644
--- a/extras/conf/udb/Includes/SRB222_linedefs.cfg
+++ b/extras/conf/udb/Includes/SRB222_linedefs.cfg
@@ -1717,7 +1717,7 @@ udmf
 		200
 		{
 			title = "Light Block";
-			prefix = "(200);
+			prefix = "(200)";
 			arg0
 			{
 				title = "Target sector tag";