diff --git a/mods/CORE/mcl_enchanting/enchantments.lua b/mods/CORE/mcl_enchanting/enchantments.lua
index f6a37f482..b70cb19cf 100644
--- a/mods/CORE/mcl_enchanting/enchantments.lua
+++ b/mods/CORE/mcl_enchanting/enchantments.lua
@@ -219,7 +219,7 @@ mcl_enchanting.enchantments.infinity = {
 	requires_tool = false,
 }
 
--- unimplemented
+-- implemented via minetest.calculate_knockback
 mcl_enchanting.enchantments.knockback = {
 	name = "Knockback",
 	max_level = 2,
@@ -234,6 +234,16 @@ mcl_enchanting.enchantments.knockback = {
 	requires_tool = false,
 }
 
+local old_calculate_knockback = minetest.calculate_knockback
+function minetest.calculate_knockback(player, hitter, time_from_last_punch, tool_capabilities, dir, distance, damage)
+	local knockback = old_calculate_knockback(player, hitter, time_from_last_punch, tool_capabilities, dir, distance, damage)
+	if hitter and hitter:is_player() then
+		local wielditem = hitter:get_wielded_item()
+		knockback = knockback + 3 * mcl_enchanting.get_enchantment(wielditem, "knockback")
+	end
+	return knockback
+end
+
 -- unimplemented
 mcl_enchanting.enchantments.looting = {
 	name = "Looting",