diff --git a/util/src/main/java/io/kubernetes/client/util/Preconditions.java b/util/src/main/java/io/kubernetes/client/util/Preconditions.java
index 6a6b61c60f..51b19c4ca2 100644
--- a/util/src/main/java/io/kubernetes/client/util/Preconditions.java
+++ b/util/src/main/java/io/kubernetes/client/util/Preconditions.java
@@ -36,7 +36,7 @@ private Preconditions() {
    * @throws IllegalArgumentException if predicate returns true
    */
   public static <T> T precondition(
-      T validate, Predicate<T> predicate, Supplier<String> errorSupplier) {
+      T validate, Predicate<? super T> predicate, Supplier<String> errorSupplier) {
     if (predicate.test(validate)) {
       throw new IllegalArgumentException(errorSupplier.get());
     }