diff --git a/boblibrary/changelog.txt b/boblibrary/changelog.txt
index 585fadb1f..19887383e 100644
--- a/boblibrary/changelog.txt
+++ b/boblibrary/changelog.txt
@@ -4,6 +4,8 @@ Date: ??. ??. ????
   Changes:
     - Added function bobmods.migration.ensure_unlocked(tech_name, recipe_name) #120
     - Added function bobmods.lib.recipe.set_category(recipe_name, category)
+    - Added function bobmods.lib.module.exclude_productivity_module(module_name)
+      - Modules supplied to this function will not be altered by function add_productivity_limitation #139
 ---------------------------------------------------------------------------------------------------
 Version: 1.1.6
 Date: 01. 01. 2023
diff --git a/boblibrary/module-functions.lua b/boblibrary/module-functions.lua
index 8f87d097c..24fbfa9f6 100644
--- a/boblibrary/module-functions.lua
+++ b/boblibrary/module-functions.lua
@@ -1,11 +1,20 @@
 if not bobmods.lib.module then
   bobmods.lib.module = {}
+  bobmods.lib.module.excluded_prod_modules = {}
+end
+
+function bobmods.lib.module.exclude_productivity_module(module_name)
+  if type(module_name) == "string" and data.raw.module[module_name] then
+    bobmods.lib.module.excluded_prod_modules[module_name] = true
+  else
+    log(debug.traceback())
+  end
 end
 
 function bobmods.lib.module.add_productivity_limitation(recipe)
   if type(recipe) == "string" and data.raw.recipe[recipe] then
     for i, module in pairs(data.raw.module) do
-      if module.limitation and module.effect.productivity then
+      if not bobmods.lib.module.excluded_prod_modules[module.name] and module.limitation and module.effect.productivity then
         table.insert(module.limitation, recipe)
       end
     end