diff --git a/doomsday/Defs/jHeretic/Special.ded b/doomsday/Defs/jHeretic/Special.ded
index 64db1842fd..a24cadfcbc 100644
--- a/doomsday/Defs/jHeretic/Special.ded
+++ b/doomsday/Defs/jHeretic/Special.ded
@@ -12,6 +12,8 @@ Flag { ID = "gnf_ceiling"; Value = 0x40; }
 Flag { ID = "gnf_space"; Value = 0x80; }
 Flag { ID = "gnf_density"; Value = 0x100; }
 Flag { ID = "gnf_modelonly"; Value = 0x200; }
+Flag { ID = "gnf_scalerate"; Value = 0x400; }
+Flag { ID = "gnf_group"; Value = 0x800; }
 
 # Particle types.
 Flag { ID = "pt_point"; Value = 1; }
diff --git a/doomsday/Defs/jHexen/Special.ded b/doomsday/Defs/jHexen/Special.ded
index 657c01115f..981fd3aab7 100644
--- a/doomsday/Defs/jHexen/Special.ded
+++ b/doomsday/Defs/jHexen/Special.ded
@@ -12,6 +12,8 @@ Flag { ID = "gnf_ceiling"; Value = 0x40; }
 Flag { ID = "gnf_space"; Value = 0x80; }
 Flag { ID = "gnf_density"; Value = 0x100; }
 Flag { ID = "gnf_modelonly"; Value = 0x200; }
+Flag { ID = "gnf_scalerate"; Value = 0x400; }
+Flag { ID = "gnf_group"; Value = 0x800; }
 
 # Particle types.
 Flag { ID = "pt_point"; Value = 1; }