diff --git a/src/gamedata/r_defs.h b/src/gamedata/r_defs.h
index 4c95a0424..a1bca88a1 100644
--- a/src/gamedata/r_defs.h
+++ b/src/gamedata/r_defs.h
@@ -520,8 +520,8 @@ struct FDynamicColormap;
 
 struct FLinkedSector
 {
-	sector_t *Sector;
-	int Type;
+	sector_t *Sector = nullptr;
+	int Type = 0;
 };