diff --git a/camera/CameraParameters.cpp b/camera/CameraParameters.cpp
index 65785c7..76a9715 100644
--- a/camera/CameraParameters.cpp
+++ b/camera/CameraParameters.cpp
@@ -70,6 +70,8 @@
 const char CameraParameters::KEY_ZOOM_SUPPORTED[] = "zoom-supported";
 const char CameraParameters::KEY_SMOOTH_ZOOM_SUPPORTED[] = "smooth-zoom-supported";
 
+const char CameraParameters::TRUE[] = "true";
+
 // Values for white balance settings.
 const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto";
 const char CameraParameters::WHITE_BALANCE_INCANDESCENT[] = "incandescent";