diff --git a/src/include/access/pg_tde_io.h b/src/include/access/pg_tde_io.h
index e5f87f4d..607c870f 100644
--- a/src/include/access/pg_tde_io.h
+++ b/src/include/access/pg_tde_io.h
@@ -51,6 +51,5 @@ extern Buffer pg_tde_RelationGetBufferForTuple(Relation relation, Size len,
 										BulkInsertStateData *bistate,
 										Buffer *vmbuffer, Buffer *vmbuffer_other,
 										int num_pages);
-extern void pg_tde_create_key_fork(const RelFileLocator *newrlocator, Relation rel);
 
 #endif							/* PG_TDE_IO_H */