diff --git a/README.md b/README.md
index 582477b..a652c6c 100644
--- a/README.md
+++ b/README.md
@@ -245,8 +245,7 @@ view `coverage/index.html` in a browser.
  0. implement CoreAudio (OSX) backend, get examples working
  0. implement WASAPI (Windows) backend, get examples working
  0. implement ASIO (Windows) backend, get examples working
- 0. JACK: implement prebuffering
- 0. why does pulseaudio microphone use up all the CPU?
+ 0. JACK: implement prebuffering ...or delete prebuffering as a concept
  0. Avoid calling `soundio_panic` in PulseAudio.
  0. Figure out a way to test prebuf. I suspect prebuf not working for ALSA
     which is why we have to pre-fill the ring buffer with silence for
diff --git a/src/pulseaudio.cpp b/src/pulseaudio.cpp
index 1503232..7dca8fb 100644
--- a/src/pulseaudio.cpp
+++ b/src/pulseaudio.cpp
@@ -460,7 +460,9 @@ static void flush_events(SoundIoPrivate *si) {
 static void wait_events(SoundIoPrivate *si) {
     SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
     flush_events(si);
+    pa_threaded_mainloop_lock(sipa->main_loop);
     pa_threaded_mainloop_wait(sipa->main_loop);
+    pa_threaded_mainloop_unlock(sipa->main_loop);
 }
 
 static void wakeup(SoundIoPrivate *si) {