* display_version.c: displays the running i3 version, runs as part of
* i3 --moreversion.
*/
-#ifndef _DISPLAY_VERSION_H
-#define _DISPLAY_VERSION_H
+#ifndef I3_DISPLAY_VERSION_H
+#define I3_DISPLAY_VERSION_H
/**
* Connects to i3 to find out the currently running version. Useful since it