diff --git a/src/p_saveg.cpp b/src/p_saveg.cpp
index 227fc91fd..8dc46e922 100644
--- a/src/p_saveg.cpp
+++ b/src/p_saveg.cpp
@@ -275,6 +275,7 @@ FSerializer &Serialize(FSerializer &arc, const char *key, sector_t &p, sector_t
 			("linked_floor", p.e->Linked.Floor.Sectors)
 			("linked_ceiling", p.e->Linked.Ceiling.Sectors)
 			("colormap", p.ColorMap, def->ColorMap)
+			("gravity", p.gravity, def->gravity)
 			.Terrain("floorterrain", p.terrainnum[0], &def->terrainnum[0])
 			.Terrain("ceilingterrain", p.terrainnum[1], &def->terrainnum[1])
 			("scrolls", scroll, nul)