diff --git a/lib/make/numbers.js b/lib/make/numbers.js
index 8faab16..c05145a 100644
--- a/lib/make/numbers.js
+++ b/lib/make/numbers.js
@@ -138,13 +138,13 @@ class number extends make {
    * Returns a float value within the supplied range
    * @param {number} min - Start value
    * @param {number} max - End value
-   * @param {number} precision
+   * @param {?number} precision
    * @returns {number}
    */
-  static frange (min, max, precision) {
+  static frange (min, max, precision = null) {
     let x = Math.random() * (min - max) + max
     if (precision) {
-      let power = Math.pow(10, precision || 0)
+      let power = Math.pow(10, precision)
       x = Math.round(x * power) / power
     }
     return x