diff --git a/include/utils/StringUtils.h b/include/utils/StringUtils.h
index b40e443a..5a1edc41 100644
--- a/include/utils/StringUtils.h
+++ b/include/utils/StringUtils.h
@@ -39,3 +39,5 @@ boolean isDigitStr(const String& str);
 boolean isDigitDotCommaStr(const String& str);
 
 String prettyBytes(size_t size);
+
+String uint64ToString(uint64_t input);