diff --git a/camera/CameraParameters.cpp b/camera/CameraParameters.cpp
index 9392cf2..d8fef09 100644
--- a/camera/CameraParameters.cpp
+++ b/camera/CameraParameters.cpp
@@ -84,6 +84,8 @@
 const char CameraParameters::KEY_VIDEO_SIZE[] = "video-size";
 const char CameraParameters::KEY_SUPPORTED_VIDEO_SIZES[] = "video-size-values";
 const char CameraParameters::KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO[] = "preferred-preview-size-for-video";
+const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_HW[] = "max-num-detected-faces-hw";
+const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_SW[] = "max-num-detected-faces-sw";
 
 const char CameraParameters::TRUE[] = "true";
 const char CameraParameters::FALSE[] = "false";