diff --git a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/NativeZip.java b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/NativeZip.java
index 4878ddaa0bf1..621d05753519 100644
--- a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/NativeZip.java
+++ b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/NativeZip.java
@@ -17,6 +17,7 @@ public class NativeZip implements NativeReference {
     private static final int STORE = 0;
 
     private volatile long mObj;
+    @JNITarget
     private InputStream mInput;
 
     public NativeZip(String path) {