diff --git a/luni/src/main/java/java/util/zip/ZipEntry.java b/luni/src/main/java/java/util/zip/ZipEntry.java
index d6781b8..26f6863 100644
--- a/luni/src/main/java/java/util/zip/ZipEntry.java
+++ b/luni/src/main/java/java/util/zip/ZipEntry.java
@@ -269,8 +269,13 @@
      * Sets the uncompressed size of this {@code ZipEntry}.
      *
      * @param value the uncompressed size for this entry.
+     * @throws IllegalArgumentException if {@code value < 0}.
      */
     public void setSize(long value) {
+        if (value < 0) {
+            throw new IllegalArgumentException("Bad size: " + value);
+        }
+
         size = value;
     }