diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index b5f61e7..ac8901c 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1850,6 +1850,7 @@
 {
     dumpBase(fd, args);
 
+    dprintf(fd, "  Master mute: %s\n", mMasterMute ? "on" : "off");
     dprintf(fd, "  Normal frame count: %zu\n", mNormalFrameCount);
     dprintf(fd, "  Last write occurred (msecs): %llu\n",
             (unsigned long long) ns2ms(systemTime() - mLastWriteTime));