diff --git a/src/ui/numeralFormat.ts b/src/ui/numeralFormat.ts
index c5935793f..ecd59b914 100644
--- a/src/ui/numeralFormat.ts
+++ b/src/ui/numeralFormat.ts
@@ -52,7 +52,7 @@ class NumeralFormatter {
         return this.format(n, "0.000a");
     }
 
-    formatAbsurdNumber(n: number, decimalPlaces: string): string {
+    formatAbsurdNumber(n: number, decimalPlaces: number): string {
         for(let i = 0; i < extraFormats.length; i++) {
             if(extraFormats[i] < n && n <= extraFormats[i]*1000) {
                 return this.format(n/extraFormats[i], '0.'+'0'.repeat(decimalPlaces))+extraNotations[i];