diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index 0e1a3c9..d485ccc 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -187,8 +187,8 @@
             sp<os::ExternalVibration> getExternalVibration() const { return mExternalVibration; }
 
             // This function should be called with holding thread lock.
-            void    updateTeePatches();
-            void    setTeePatchesToUpdate(TeePatches teePatchesToUpdate);
+            void    updateTeePatches_l();
+            void    setTeePatchesToUpdate_l(TeePatches teePatchesToUpdate);
 
     void tallyUnderrunFrames(size_t frames) override {
        if (isOut()) { // we expect this from output tracks only
@@ -335,8 +335,9 @@
 
 private:
     void                interceptBuffer(const AudioBufferProvider::Buffer& buffer);
+    // Must hold thread lock to access tee patches
     template <class F>
-    void                forEachTeePatchTrack(F f) {
+    void                forEachTeePatchTrack_l(F f) {
         for (auto& tp : mTeePatches) { f(tp.patchTrack); }
     };