diff --git a/mods/ITEMS/mclx_core/init.lua b/mods/ITEMS/mclx_core/init.lua
index f16d57ba0..929ec2137 100644
--- a/mods/ITEMS/mclx_core/init.lua
+++ b/mods/ITEMS/mclx_core/init.lua
@@ -5,6 +5,7 @@ source.description = "Still River Water"
 source.liquid_range = 2
 source.liquid_alternative_flowing = "mclx_core:river_water_flowing"
 source.liquid_alternative_source = "mclx_core:river_water_source"
+source.liquid_renewable = false
 source._doc_items_longdesc = "River water has the same properties as water, but has a reduced flowing distance and is not renewable."
 source._doc_items_entry_name = "River Water"
 -- Auto-expose entry only in valleys mapgen
@@ -27,6 +28,7 @@ flowing.description = "Flowing River Water"
 flowing.liquid_range = 2
 flowing.liquid_alternative_flowing = "mclx_core:river_water_flowing"
 flowing.liquid_alternative_source = "mclx_core:river_water_source"
+flowing.liquid_renewable = false
 flowing.tiles = {"default_river_water_flowing_animated.png^[verticalframe:64:0"}
 flowing.post_effect_color = {a=204, r=0x2c, g=0x88, b=0x8c}
 flowing.special_tiles = {