diff --git a/soitool/database.py b/soitool/database.py
index b3a985c723e48a899e8d1bf35c462d1a42bc3ce2..4fc3ae755fac3860eaa5d70d691dcec5041669e1 100644
--- a/soitool/database.py
+++ b/soitool/database.py
@@ -218,7 +218,7 @@ class Database:
 
     def seconds_to_next_update(self):
         """
-        Returns time to next update of Codebook in seconds.
+        Return time to next update of Codebook in seconds.
 
         Returns
         -------