diff --git a/petab/v1/priors.py b/petab/v1/priors.py
index 1b10e7a1..79f274bb 100644
--- a/petab/v1/priors.py
+++ b/petab/v1/priors.py
@@ -32,6 +32,8 @@
     Problem,
 )
 
+__all__ = ["priors_to_measurements"]
+
 
 def priors_to_measurements(problem: Problem):
     """Convert priors to measurements.