diff --git a/src/newgrf_commons.h b/src/newgrf_commons.h
index fc7d407796..13e0f9a053 100644
--- a/src/newgrf_commons.h
+++ b/src/newgrf_commons.h
@@ -109,9 +109,9 @@ static const uint TLR_MAX_VAR10 = 7; ///< Maximum value for var 10.
  * In contrast to #DrawTileSprites this struct is for allocated
  * layouts on the heap. It allocates data and frees them on destruction.
  */
-struct NewGRFSpriteLayout : ZeroedMemoryAllocator, DrawTileSprites {
-	std::vector<DrawTileSeqStruct> seq;
-	std::vector<TileLayoutRegisters> registers;
+struct NewGRFSpriteLayout : DrawTileSprites {
+	std::vector<DrawTileSeqStruct> seq{};
+	std::vector<TileLayoutRegisters> registers{};
 
 	/**
 	 * Number of sprites in all referenced spritesets.
diff --git a/src/sprite.h b/src/sprite.h
index b330e63895..c9a89ce163 100644
--- a/src/sprite.h
+++ b/src/sprite.h
@@ -44,7 +44,7 @@ struct DrawTileSeqStruct {
  * For allocated ones from NewGRF see #NewGRFSpriteLayout.
  */
 struct DrawTileSprites {
-	PalSpriteID ground; ///< Palette and sprite for the ground
+	PalSpriteID ground{}; ///< Palette and sprite for the ground
 
 	DrawTileSprites(PalSpriteID ground) : ground(ground) {}
 	DrawTileSprites() = default;