Dependency checker missing a dependency

[obycode]

(define-read-only (force-trait-ref (addr <tt>)) addr)
(define-constant MY_CONSTANT (force-trait-ref 'SPJ81C2WPQHFB6XTG518JKPABWM639R2X0B331XE.slimy-copper-walrus))

In the above contract, the dependency checker does not detect 'SPJ81C2WPQHFB6XTG518JKPABWM639R2X0B331XE.slimy-copper-walrus as a dependency.