diff --git a/package/proftpd/proftpd.mk b/package/proftpd/proftpd.mk
index 8e7d108c9e..d3b6308185 100644
--- a/package/proftpd/proftpd.mk
+++ b/package/proftpd/proftpd.mk
@@ -27,6 +27,10 @@ PROFTPD_CONF_OPTS = \
 	--with-gnu-ld \
 	--without-openssl-cmdline
 
+ifeq ($(BR2_PACKAGE_LIBIDN2),y)
+PROFTPD_DEPENDENCIES += libidn2
+endif
+
 ifeq ($(BR2_PACKAGE_PROFTPD_MOD_CAP),y)
 PROFTPD_CONF_OPTS += --enable-cap
 PROFTPD_DEPENDENCIES += libcap