diff --git a/changelog.txt b/changelog.txt
index 67521a2..aa91f8f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 0.3.12
+Date: 25.1.2018
+  Bugfixes:
+    - fixed null reference for recipe.ingredients #2
+---------------------------------------------------------------------------------------------------
 Version: 0.3.11
 Date: 25.1.2018
   Bugfixes:
diff --git a/info.json b/info.json
index 3334a57..d490b3c 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
   "name": "ReStack",
-  "version": "0.3.11",
+  "version": "0.3.12",
   "title": "ReStack",
   "author": "Optera",
   "contact": "https://forums.factorio.com/memberlist.php?mode=viewprofile&u=21729",
diff --git a/modules/lib.lua b/modules/lib.lua
index e724828..30d87fb 100644
--- a/modules/lib.lua
+++ b/modules/lib.lua
@@ -30,8 +30,10 @@ end
 
 function SelectItemsByRecipeInput(recipe, stack_size, category)
   if recipe.ingredients then
-    for _, ingredient in pairs(recipe.ingredients) do      
-      ReStack_Items[ingredient[1]] = {stack_size = stack_size, type = category}
+    for n, ingredient in pairs(recipe.ingredients) do          
+      if ingredient[1] then
+        ReStack_Items[ingredient[1]] = {stack_size = stack_size, type = category}
+      end
     end
   end
 end