diff --git a/ext/intl/config.w32 b/ext/intl/config.w32
index e793cd8cf81..9184f8dfcd7 100755
--- a/ext/intl/config.w32
+++ b/ext/intl/config.w32
@@ -63,6 +63,9 @@ if (PHP_INTL != "no") {
 				dateformat_parse.c \
 				dateformat_data.c \
 				", "intl");
+		ADD_SOURCES(configure_module_dirname + "/idn", "\
+				idn.c",
+				"intl");
 		ADD_FLAG("LIBS_INTL", "icudt.lib icuin.lib icuio.lib icule.lib iculx.lib");
 		AC_DEFINE("HAVE_INTL", 1, "Internationalization support enabled");
 	} else {