diff --git a/projects/Gibbed.BorderlandsOz.GameInfo/ItemBalanceDefinition.cs b/projects/Gibbed.BorderlandsOz.GameInfo/ItemBalanceDefinition.cs
index 9641f2e..71b46c6 100644
--- a/projects/Gibbed.BorderlandsOz.GameInfo/ItemBalanceDefinition.cs
+++ b/projects/Gibbed.BorderlandsOz.GameInfo/ItemBalanceDefinition.cs
@@ -139,6 +139,11 @@ List<string> getList(IEnumerable<string> enumerable)
                 }
             }
 
+            if (result.Item != item && result.Items.Contains(item) == false)
+            {
+                throw new ResourceNotFoundException($"item type '{item.ResourcePath}' is not valid for '{this.ResourcePath}'");
+            }
+
             return result;
         }
 
diff --git a/projects/Gibbed.BorderlandsOz.GameInfo/WeaponBalanceDefinition.cs b/projects/Gibbed.BorderlandsOz.GameInfo/WeaponBalanceDefinition.cs
index 07af05a..6332861 100644
--- a/projects/Gibbed.BorderlandsOz.GameInfo/WeaponBalanceDefinition.cs
+++ b/projects/Gibbed.BorderlandsOz.GameInfo/WeaponBalanceDefinition.cs
@@ -123,6 +123,11 @@ public WeaponBalanceDefinition Create(WeaponTypeDefinition weaponType)
                 AddPartList(balance.Parts.MaterialParts, balance.Parts.Mode, result.Parts.MaterialParts);
             }
 
+            if (result.WeaponType != weaponType)
+            {
+                throw new ResourceNotFoundException($"weapon type '{weaponType.ResourcePath}' is not valid for '{this.ResourcePath}'");
+            }
+
             return result;
         }