#if defined TIMER3A_ENABLED && defined TIMER3_COMPA_vect
-DEFINE_REGISTER_OC_INTR_AT_TICS(3, TIMER3_COMPA_vect)
+DEFINE_REGISTER_OC_INTR_AT_TICS(3A, TIMER3_COMPA_vect)
#endif
#if defined TIMER3B_ENABLED && defined TIMER3_COMPB_vect
-DEFINE_REGISTER_OC_INTR_AT_TICS(3, TIMER3_COMPB_vect)
+DEFINE_REGISTER_OC_INTR_AT_TICS(3B, TIMER3_COMPB_vect)
#endif
#if defined TIMER3C_ENABLED && defined TIMER3_COMPC_vect
-DEFINE_REGISTER_OC_INTR_AT_TICS(3, TIMER3_COMPC_vect)
+DEFINE_REGISTER_OC_INTR_AT_TICS(3C, TIMER3_COMPC_vect)
#endif