diff -r 2e75223c078e -r df92c3d93904 libpurple/imgstore.h
--- a/libpurple/imgstore.h	Fri Jun 15 00:23:44 2012 -0400
+++ b/libpurple/imgstore.h	Fri Jun 15 00:59:46 2012 -0400
@@ -29,6 +29,8 @@
 
 #include <glib.h>
 
+#define PURPLE_STORED_IMAGE_PROTOCOL "purple-image:"
+
 /** A reference-counted immutable wrapper around an image's data and its
  *  filename.
  */