diff --git a/java/com/facebook/soloader/ExtractFromZipSoSource.java b/java/com/facebook/soloader/ExtractFromZipSoSource.java
index 7ae4780..6ca8fbd 100644
--- a/java/com/facebook/soloader/ExtractFromZipSoSource.java
+++ b/java/com/facebook/soloader/ExtractFromZipSoSource.java
@@ -197,7 +197,7 @@ public int compareTo(ZipDso other) {
     }
 
     @Override
-    public boolean equals(Object other) {
+    public boolean equals(@Nullable Object other) {
       if (this == other) {
         return true;
       }