diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index cfd79bc..41b4845 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -273,7 +273,7 @@
 
     // validate parameters
     if (!audio_is_valid_format(format)) {
-        ALOGE("Invalid format %d", format);
+        ALOGE("Invalid format %#x", format);
         return BAD_VALUE;
     }
     mFormat = format;