diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index f37929c4..93945354 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -2473,9 +2473,6 @@ local function register_decorations()
 					{ name = "mcl_flowers:double_grass_top", param1=255, param2=param2 },
 				},
 			},
-			replacements = {
-				["mcl_flowers:tallgrass"] = "mcl_flowers:double_grass",
-			},
 			place_on = {"group:grass_block_no_snow"},
 			sidelen = 16,
 			noise_params = {
@@ -2508,9 +2505,6 @@ local function register_decorations()
 					{ name = "mcl_flowers:double_fern_top", param1=255, },
 				},
 			},
-			replacements = {
-				["mcl_flowers:fern"] = "mcl_flowers:double_fern"
-			},
 			place_on = {"group:grass_block_no_snow", "mcl_core:podzol"},
 			sidelen = 16,
 			noise_params = {
diff --git a/mods/MAPGEN/mcl_mapgen_core/init.lua b/mods/MAPGEN/mcl_mapgen_core/init.lua
index 0586404d..eb9caa63 100644
--- a/mods/MAPGEN/mcl_mapgen_core/init.lua
+++ b/mods/MAPGEN/mcl_mapgen_core/init.lua
@@ -679,9 +679,6 @@ local function register_mgv6_decorations()
 				{ name = "mcl_flowers:double_grass_top", param1 = 255, },
 			},
 		},
-		replacements = {
-			["mcl_flowers:tallgrass"] = "mcl_flowers:double_grass"
-		},
 		place_on = {"group:grass_block_no_snow"},
 		sidelen = 8,
 		noise_params = {
@@ -707,9 +704,6 @@ local function register_mgv6_decorations()
 				{ name = "mcl_flowers:double_fern_top", param1=255, },
 			},
 		},
-		replacements = {
-			["mcl_flowers:fern"] = "mcl_flowers:double_fern"
-		},
 		-- v6 hack: This makes sure large ferns only appear in jungles
 		spawn_by = { "mcl_core:jungletree", "mcl_flowers:fern" },
 		num_spawn_by = 1,