diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt
index d5c4d3865..f5bec4d00 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt
@@ -117,9 +117,19 @@ fun BigInteger.formatSiComponent(suffix: Any = "", decimalPlaces: Int = 3, forma
 private val never = BooleanSupplier { false }
 
 private fun reformat(numbers: String): String {
-	if (numbers.length <= 4)
+	@Suppress("NAME_SHADOWING")
+	var numbers = numbers
+
+	if (numbers.isEmpty() || numbers.length <= 4)
 		return numbers
 
+	val negative = numbers[0] == '-'
+
+	if (negative && numbers.length == 5)
+		return numbers
+	else if (negative)
+		numbers = numbers.substring(1)
+
 	val result = CharArrayList((numbers.length * 1.6).roundToInt())
 
 	var dot = numbers.lastIndexOf('.')
@@ -145,6 +155,9 @@ private fun reformat(numbers: String): String {
 		result.add(numbers[i])
 	}
 
+	if (negative)
+		result.add('-')
+
 	return String(CharArray(result.size) {
 		result.getChar(result.size - it - 1)
 	})