diff --git a/src/ui/formatNumber.ts b/src/ui/formatNumber.ts
index 724d478b2..15348f60d 100644
--- a/src/ui/formatNumber.ts
+++ b/src/ui/formatNumber.ts
@@ -113,8 +113,11 @@ export function formatNumber(n: number, fractionalDigits = 3, suffixStart = 1000
 
   // Special handling for Infinities
   if (nAbs === Infinity) return n < 0 ? "-∞" : "∞";
+  if (suffixStart < 1000) {
+    throw new Error("suffixStart must be greater than or equal to 1000");
+  }
 
-  // Early return for non-suffix
+  // Early return for non-suffix or if number and suffix are 0
   if (nAbs < suffixStart) {
     if (isInteger) return basicFormatter.format(n);
     return getFormatter(fractionalDigits).format(n);