  We formulate an effective theory for systems containing a heavy Majorana
fermion, such as bound states of a long-lived gluino. This "Majorana HQET" has
the same degrees of freedom as the well-studied Dirac HQET. It respects an
emergent U(1) symmetry despite the fundamental absence of a U(1) for Majorana
fermions. Reparameterization invariance works identically in the two HQETs.
Remarkably, while a Dirac HQET may or may not be charge conjugation symmetric,
a charge conjugation symmetry emerges in all Majorana HQETs, potentially
offering low energy probes to distinguish the two theories.
