diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index d1e40c9fcb..e6b554feb3 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -370,6 +370,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 4,
+		node_river_water = "mcl_core:ice",
 		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 4,
 		y_min = 45,