diff --git a/src/main/java/com/couchbase/lite/support/PersistentCookieStore.java b/src/main/java/com/couchbase/lite/support/PersistentCookieStore.java
index <HASH>..<HASH> 100644
--- a/src/main/java/com/couchbase/lite/support/PersistentCookieStore.java
+++ b/src/main/java/com/couchbase/lite/support/PersistentCookieStore.java
@@ -78,6 +78,12 @@ public class PersistentCookieStore implements CookieStore {
                 return;
             }
             for (String name : cookiesDoc.keySet()) {
+
+                // ignore special couchbase lite fields like _id and _rev
+                if (name.startsWith("_")) {
+                    continue;
+                }
+
                 String encodedCookie = (String) cookiesDoc.get(name);
                 if (encodedCookie == null) {
                     continue;
@@ -120,6 +126,8 @@ public class PersistentCookieStore implements CookieStore {
             cookiesDoc = new HashMap<String, Object>();
         }
 
+        Log.v(Log.TAG_SYNC, "Saving cookie: %s w/ encoded value: %s", name, encodedCookie);
+
         cookiesDoc.put(name, encodedCookie);
 
         try {
Issue #<I> - ignore special doc fields like _id and _rev

This was causing exceptions in logs

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