diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 2e6037b..29ba5a7 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -5289,11 +5289,11 @@
         return false;
     }
     // Check validity as we don't call AudioMixer::create() here.
-    if (!AudioMixer::isValidFormat(format)) {
+    if (!mAudioMixer->isValidFormat(format)) {
         ALOGW("%s: invalid format: %#x", __func__, format);
         return false;
     }
-    if (!AudioMixer::isValidChannelMask(channelMask)) {
+    if (!mAudioMixer->isValidChannelMask(channelMask)) {
         ALOGW("%s: invalid channelMask: %#x", __func__, channelMask);
         return false;
     }