diff --git a/src/rolls/check-factory.ts b/src/rolls/check-factory.ts
index e020880d..dd475d6c 100644
--- a/src/rolls/check-factory.ts
+++ b/src/rolls/check-factory.ts
@@ -12,8 +12,7 @@ class DefaultCheckOptions implements DS4CheckFactoryOptions {
     readonly maximumCoupResult = 1;
     readonly minimumFumbleResult = 20;
     readonly useSlayingDice = false;
-    // TODO: Use the type `keyof CONFIG.Dice.rollModes` instead as soon as https://github.com/League-of-Foundry-Developers/foundry-vtt-types/issues/1501 has been resolved.
-    readonly rollMode: foundry.CONST.DICE_ROLL_MODES = "publicroll";
+    readonly rollMode: keyof CONFIG.Dice.RollModes = "publicroll";
     readonly flavor: undefined;
 
     mergeWith(other: Partial<DS4CheckFactoryOptions>): DS4CheckFactoryOptions {
@@ -198,7 +197,7 @@ function parseDialogFormData(formData: HTMLFormElement): Partial<IntermediateGmM
  */
 interface GmModifierData {
     gmModifier: number;
-    rollMode: foundry.CONST.DICE_ROLL_MODES;
+    rollMode: keyof CONFIG.Dice.RollModes;
 }
 
 /**
@@ -229,7 +228,7 @@ export interface DS4CheckFactoryOptions {
     maximumCoupResult: number;
     minimumFumbleResult: number;
     useSlayingDice: boolean;
-    rollMode: foundry.CONST.DICE_ROLL_MODES;
+    rollMode: keyof CONFIG.Dice.RollModes;
     flavor?: string;
     flavorData?: Record<string, string | number | null>;
     speaker?: ReturnType<typeof ChatMessage.getSpeaker>;