diff --git a/panda/src/egg/eggGroup.h b/panda/src/egg/eggGroup.h
index e295894409..43c44a1fec 100644
--- a/panda/src/egg/eggGroup.h
+++ b/panda/src/egg/eggGroup.h
@@ -82,6 +82,7 @@ PUBLISHED:
     CST_sphere               = 0x00040000,
     CST_tube                 = 0x00050000,
     CST_inv_sphere           = 0x00060000,
+    CST_floor_mesh           = 0x00080000,
   };
   enum CollideFlags {
     // The bits here must correspond to those in Flags, below, and