diff --git a/media/ndk/NdkMediaDrm.cpp b/media/ndk/NdkMediaDrm.cpp
index 8d34ab0..cdce932 100644
--- a/media/ndk/NdkMediaDrm.cpp
+++ b/media/ndk/NdkMediaDrm.cpp
@@ -222,8 +222,7 @@
 
 
 static bool findId(AMediaDrm *mObj, const AMediaDrmByteArray &id, List<idvec_t>::iterator &iter) {
-    iter = mObj->mIds.begin();
-    while (iter != mObj->mIds.end()) {
+    for (iter = mObj->mIds.begin(); iter != mObj->mIds.end(); ++iter) {
         if (iter->array() == id.ptr && iter->size() == id.length) {
             return true;
         }