diff --git a/module/ldbc-statement/src/main/scala/ldbc/statement/Insert.scala b/module/ldbc-statement/src/main/scala/ldbc/statement/Insert.scala
index 01d4e42c9..b67572e0e 100644
--- a/module/ldbc-statement/src/main/scala/ldbc/statement/Insert.scala
+++ b/module/ldbc-statement/src/main/scala/ldbc/statement/Insert.scala
@@ -31,7 +31,7 @@ sealed trait Insert[A] extends Command:
    *     .onDuplicateKeyUpdate(_.name)
    * }}}
    */
-  def onDuplicateKeyUpdate[C](columns: A => Column[C]): Insert.DuplicateKeyUpdate[A]
+  def onDuplicateKeyUpdate[B](columns: A => Column[B]): Insert.DuplicateKeyUpdate[A]
 
   /**
    * Methods for constructing INSERT ... ON DUPLICATE KEY UPDATE statements.