diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index 087f0156eb..54e3a1a341 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -143,6 +143,7 @@ typedef isc_uint64_t                    rbtdb_serial_t;
 
 #define once once64
 #define FILE_VERSION FILE_VERSION64
+#define init_count init_count64
 
 #define cache_methods cache_methods64
 #define dbiterator_methods dbiterator_methods64