diff --git a/lib/isc/win32/libisc.def.exclude b/lib/isc/win32/libisc.def.exclude
index f18437c954..6cd4797582 100644
--- a/lib/isc/win32/libisc.def.exclude
+++ b/lib/isc/win32/libisc.def.exclude
@@ -37,3 +37,5 @@ isc_socket_register
 isc_print_vsnprintf
 isc_print_snprintf
 isc_print_sprintf
+isc_print_fprintf
+isc_print_printf