diff --git a/guava/src/com/google/common/primitives/UnsignedInteger.java b/guava/src/com/google/common/primitives/UnsignedInteger.java
index 96fc1cbaefbc..74c3a5d8bec7 100644
--- a/guava/src/com/google/common/primitives/UnsignedInteger.java
+++ b/guava/src/com/google/common/primitives/UnsignedInteger.java
@@ -195,7 +195,10 @@ public UnsignedInteger mod(UnsignedInteger val) {
 
   /** Returns the value of this {@code UnsignedInteger} as a {@code long}. */
   @Override
-  @SuppressWarnings("value:cast.unsafe") // Unknown long to PolyValue long is ok
+  @SuppressWarnings({
+    "value:cast.unsafe",
+    "cast.incomparable"
+  }) // Unknown long to PolyValue long is ok
   public @PolyValue long longValue(@PolyValue UnsignedInteger this) {
     return (@PolyValue long) toLong(value);
   }