diff --git a/src/types/_ActivatableSkillCheckResultBased.ts b/src/types/_ActivatableSkillCheckResultBased.ts
index e1b76498..8d5ef0a5 100644
--- a/src/types/_ActivatableSkillCheckResultBased.ts
+++ b/src/types/_ActivatableSkillCheckResultBased.ts
@@ -14,6 +14,8 @@ const CheckResultArithmetic = DB.Enum(import.meta.url, {
   name: "CheckResultArithmetic",
   comment: "Defines how the the `value` is set off against the check result.",
   values: () => ({
+    Add: DB.EnumCase({ type: null }),
+    Subtract: DB.EnumCase({ type: null }),
     Multiply: DB.EnumCase({ type: null }),
     Divide: DB.EnumCase({ type: null }),
   }),
@@ -29,7 +31,7 @@ export const CheckResultBasedModifier = DB.TypeAlias(import.meta.url, {
       }),
       value: DB.Required({
         comment: "The value that is applied to the `base` using the defined `arithmetic`.",
-        type: DB.Integer({ minimum: 2 }),
+        type: DB.Integer({ minimum: 1 }),
       }),
     }),
 })