diff --git a/packages/bignumber/src.ts/fixednumber.ts b/packages/bignumber/src.ts/fixednumber.ts
index 7bd9ffd9e6..15279424bd 100644
--- a/packages/bignumber/src.ts/fixednumber.ts
+++ b/packages/bignumber/src.ts/fixednumber.ts
@@ -288,8 +288,10 @@ export class FixedNumber {
 
         if (comps[1].length <= decimals) { return this; }
 
-        const factor = FixedNumber.from("1" + zeros.substring(0, decimals));
-        return this.mulUnsafe(factor).addUnsafe(BUMP).floor().divUnsafe(factor);
+        const factor = FixedNumber.from("1" + zeros.substring(0, decimals), this.format);
+        const bump = BUMP.toFormat(this.format);
+
+        return this.mulUnsafe(factor).addUnsafe(bump).floor().divUnsafe(factor);
     }
 
     isZero(): boolean {