diff --git a/mods/craftingpack/crafting/creative.lua b/mods/craftingpack/crafting/creative.lua
index d5980bc2..c4f750a9 100644
--- a/mods/craftingpack/crafting/creative.lua
+++ b/mods/craftingpack/crafting/creative.lua
@@ -289,7 +289,7 @@ crafting.set_creative_formspec = function(player, start_i, pagenum, show, page,
 				if filter == nil then
 					filter = ""
 				end
-				formspec = formspec .. "field[5.3,1.3;4,0.75;suche;;"..filter.."]"
+				formspec = formspec .. "field[5.3,1.3;4,0.75;suche;;"..minetest.formspec_escape(filter).."]"
 				formspec = formspec .. "field_close_on_enter[suche;false]"
 			end
 			if pagenum ~= nil then formspec = formspec .. "p"..tostring(pagenum) end