diff --git a/boblibrary/recipe-functions.lua b/boblibrary/recipe-functions.lua
index b6b76f86e..4d0ce1288 100644
--- a/boblibrary/recipe-functions.lua
+++ b/boblibrary/recipe-functions.lua
@@ -332,7 +332,7 @@ function bobmods.lib.recipe.set_category(recipe_name, category)
   end
 end
 
-function bobmods.lib.recipe.allow_productivity
+function bobmods.lib.recipe.allow_productivity()
   if type(recipe_name) == "string" then
     local recipe = data.raw.recipe[recipe_name]
     if recipe then
@@ -344,7 +344,7 @@ function bobmods.lib.recipe.allow_productivity
   end
 end
 
-function bobmods.lib.recipe.disallow_productivity
+function bobmods.lib.recipe.disallow_productivity()
   if type(recipe_name) == "string" then
     local recipe = data.raw.recipe[recipe_name]
     if recipe then