diff --git a/src/math/round.ts b/src/math/round.ts
index de32d57..6f9b1ce 100644
--- a/src/math/round.ts
+++ b/src/math/round.ts
@@ -4,8 +4,8 @@ export function round(val: number, precision: number = 0) {
   return baseRound(val, precision, Math.round)
 }
 
-export function baseRound(val: number, precision: number = 0, fn: (val: number) => number) {
-  precision = clamp(precision, -292, 292)
+export function baseRound(val: number, precision: number, fn: (val: number) => number) {
+  precision = clamp(precision ?? 0, -292, 292)
 
   if (!precision) {
     return fn(val)