diff --git a/classlib/src/main/java/org/teavm/classlib/impl/RandomUtils.java b/classlib/src/main/java/org/teavm/classlib/impl/RandomUtils.java
index e8d6c44f9..eb5c8b046 100644
--- a/classlib/src/main/java/org/teavm/classlib/impl/RandomUtils.java
+++ b/classlib/src/main/java/org/teavm/classlib/impl/RandomUtils.java
@@ -18,6 +18,9 @@ package org.teavm.classlib.impl;
 import java.util.function.DoubleSupplier;
 
 public class RandomUtils {
+    private RandomUtils() {
+    }
+
     public static void checkStreamSize(long streamSize) {
         if (streamSize < 0L) {
             throw new IllegalArgumentException();