diff --git a/libs/binder/ndk/ibinder.cpp b/libs/binder/ndk/ibinder.cpp
index c78b9fc..af280d3 100644
--- a/libs/binder/ndk/ibinder.cpp
+++ b/libs/binder/ndk/ibinder.cpp
@@ -487,6 +487,11 @@
               "This will cause the onUnlinked callback to be called multiple times with the same "
               "cookie, which is usually not intended.");
     }
+    if (!mOnUnlinked && cookie) {
+        ALOGW("AIBinder_linkToDeath is being called with a non-null cookie and no onUnlink "
+              "callback set. This might not be intended. AIBinder_DeathRecipient_setOnUnlinked "
+              "should be called first.");
+    }
 
     sp<TransferDeathRecipient> recipient =
             new TransferDeathRecipient(binder, cookie, this, mOnDied, mOnUnlinked);