A Study to Evaluate the Long-term Safety and Tolerability of Lucerastat in Adult Subjects With Fabry Disease

Inclusion Criteria:

- Signed ICF prior to any study-mandated procedure;

- Subject completed the 6-month, double-blind treatment period in study ID 069A301

- Woman of childbearing potential only if agreement 1) to follow a specified
contraception scheme, 2) to undertake monthly urine pregnancy tests , 3) not to donate
ova.

- Fertile male only if agreement 1) to use a condom, 2) to not father a child, 3) not to
donate sperm.

Exclusion Criteria:

- Pregnant / planning to be become pregnant up to 30 days after study treatment
discontinuation or lactating subject;

- Subject considered to be at high risk of developing clinical signs of organ
involvement within the time period of the study, as per investigator judgment;

- Any known factor or disease that might interfere with treatment compliance, study
conduct or interpretation of the results as per investigator judgment.

In addition, the subject must not be enrolled in study ID-069A302 if at any time during
study ID-069A301, one of the following criteria was met:

- Subject's eGFR per the Chronic Kidney Disease Epidemiology Collaboration creatinine
equation < 15 mL/min/1.73 m2;

- Subject experienced an event of acute kidney injury Common Terminology Criteria for
Adverse Event (CTCAE) grade 2 or above;

- Subject experienced an event of stroke CTCAE grade 3 or above;

- Subject experienced an event of heart failure leading to in-patient hospitalization or
prolongation of ongoing hospitalization.