diff --git a/media/ndk/NdkMediaDrm.cpp b/media/ndk/NdkMediaDrm.cpp
index fe08ab9..6d10f1c 100644
--- a/media/ndk/NdkMediaDrm.cpp
+++ b/media/ndk/NdkMediaDrm.cpp
@@ -224,7 +224,7 @@
 
 static bool findId(AMediaDrm *mObj, const AMediaDrmByteArray &id, List<idvec_t>::iterator &iter) {
     for (iter = mObj->mIds.begin(); iter != mObj->mIds.end(); ++iter) {
-        if (iter->array() == id.ptr && iter->size() == id.length) {
+        if (id.length == iter->size() && memcmp(iter->array(), id.ptr, iter->size()) == 0) {
             return true;
         }
     }