diff --git a/ktorm-core/src/main/kotlin/org/ktorm/database/Database.kt b/ktorm-core/src/main/kotlin/org/ktorm/database/Database.kt
index 070216a1..4ff0c17d 100644
--- a/ktorm-core/src/main/kotlin/org/ktorm/database/Database.kt
+++ b/ktorm-core/src/main/kotlin/org/ktorm/database/Database.kt
@@ -118,7 +118,7 @@ public class Database(
     /**
      * Function used to translate SQL exceptions to rethrow them to users.
      */
-    public val exceptionTranslator: ((SQLException) -> Throwable)? = null,
+    public val exceptionTranslator: ((SQLException) -> Throwable?)? = null,
 
     /**
      * Whether we need to always quote SQL identifiers in the generated SQLs.