diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/util/random/RandomUtils.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/util/random/RandomUtils.kt
index dd3b6f44..2a6a4215 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/util/random/RandomUtils.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/util/random/RandomUtils.kt
@@ -203,11 +203,31 @@ fun RandomGenerator.nextBytes(length: Int): ByteArray {
 	return data
 }
 
-fun <T> Collection<T>.random(random: RandomGenerator): T {
+// for randomgen compat only
+@Deprecated("Delicate API, use only when required for compatibility with original protocol")
+fun RandomGenerator.randu64(): ULong {
+	val a = nextInt().toLong() and 0xFFFFFFFFL
+	val b = nextInt().toLong() and 0xFFFFFFFFL
+	return a.toULong().shl(32) or b.toULong()
+}
+
+// for randomgen compat only
+@Deprecated("Delicate API, use only when required for compatibility with original protocol")
+fun RandomGenerator.nextUInt(max: ULong): ULong {
+	val denom = ULong.MAX_VALUE / (max + 1UL)
+	return randu64() / denom
+}
+
+fun <T> Collection<T>.random(random: RandomGenerator, legacyCompatibleSelection: Boolean = false): T {
 	if (isEmpty())
 		throw NoSuchElementException("List is empty")
 
-	return elementAt(random.nextInt(size))
+	if (legacyCompatibleSelection) {
+		// marvelous
+		return elementAt(random.nextUInt(size.toULong()).toInt())
+	} else {
+		return elementAt(random.nextInt(size))
+	}
 }
 
 fun JsonArray.random(random: RandomGenerator): JsonElement {