diff --git a/media/libmedia/AudioParameter.cpp b/media/libmedia/AudioParameter.cpp
index 9766ee6..e3fea77 100644
--- a/media/libmedia/AudioParameter.cpp
+++ b/media/libmedia/AudioParameter.cpp
@@ -31,6 +31,7 @@
 const char * const AudioParameter::keyChannels = AUDIO_PARAMETER_STREAM_CHANNELS;
 const char * const AudioParameter::keyFrameCount = AUDIO_PARAMETER_STREAM_FRAME_COUNT;
 const char * const AudioParameter::keyInputSource = AUDIO_PARAMETER_STREAM_INPUT_SOURCE;
+const char * const AudioParameter::keyScreenState = AUDIO_PARAMETER_KEY_SCREEN_STATE;
 
 AudioParameter::AudioParameter(const String8& keyValuePairs)
 {