diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 9ac9105..a392b76 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -319,7 +319,7 @@
 
     result.append(" AudioCache\n");
     if (mHeap != 0) {
-        snprintf(buffer, 255, "  heap base(%p), size(%d), flags(%d)\n",
+        snprintf(buffer, 255, "  heap base(%p), size(%zu), flags(%d)\n",
                 mHeap->getBase(), mHeap->getSize(), mHeap->getFlags());
         result.append(buffer);
     }