diff --git a/Build/Configurations/Includes/SRB222_linedefs.cfg b/Build/Configurations/Includes/SRB222_linedefs.cfg
index 621b4abd..235b137c 100644
--- a/Build/Configurations/Includes/SRB222_linedefs.cfg
+++ b/Build/Configurations/Includes/SRB222_linedefs.cfg
@@ -3732,7 +3732,7 @@ udmf
 			{
 				title = "Flags";
 				type = 12;
-				flags
+				enum
 				{
 					1 = "Slide";
 					2 = "Non-exclusive";