diff --git a/lib/dns/include/dns/zt.h b/lib/dns/include/dns/zt.h
index 3120672138..9ae28f7dd7 100644
--- a/lib/dns/include/dns/zt.h
+++ b/lib/dns/include/dns/zt.h
@@ -22,7 +22,6 @@
 
 #include <isc/mem.h>
 #include <dns/name.h>
-#include <dns/zone.h>
 #include <dns/types.h>
 #include <dns/rbt.h>
 
diff --git a/lib/dns/zt.c b/lib/dns/zt.c
index ea8bef8ac0..361199fed3 100644
--- a/lib/dns/zt.c
+++ b/lib/dns/zt.c
@@ -24,6 +24,7 @@
 #include <isc/util.h>
 
 #include <dns/zt.h>
+#include <dns/zone.h>
 
 struct dns_zt {
 	/* Unlocked. */