diff --git a/src/basic/socket-util.c b/src/basic/socket-util.c
index bd3cf6f869..3b93da7301 100644
--- a/src/basic/socket-util.c
+++ b/src/basic/socket-util.c
@@ -51,7 +51,7 @@
 #include "util.h"
 
 #if ENABLE_IDN
-#  define IDN_FLAGS (NI_IDN|NI_IDN_USE_STD3_ASCII_RULES)
+#  define IDN_FLAGS NI_IDN
 #else
 #  define IDN_FLAGS 0
 #endif