diff --git a/package/asterisk/Config.in b/package/asterisk/Config.in
index ba5a574042..71c741acfd 100644
--- a/package/asterisk/Config.in
+++ b/package/asterisk/Config.in
@@ -12,6 +12,7 @@ config BR2_PACKAGE_ASTERISK
 	select BR2_PACKAGE_LIBILBC
 	select BR2_PACKAGE_LIBJWT
 	select BR2_PACKAGE_LIBPJSIP
+	select BR2_PACKAGE_LIBXCRYPT if BR2_TOOLCHAIN_USES_GLIBC
 	select BR2_PACKAGE_LIBXML2
 	select BR2_PACKAGE_SQLITE
 	select BR2_PACKAGE_UTIL_LINUX
diff --git a/package/asterisk/asterisk.mk b/package/asterisk/asterisk.mk
index c37aa5ec9d..be27509441 100644
--- a/package/asterisk/asterisk.mk
+++ b/package/asterisk/asterisk.mk
@@ -238,6 +238,11 @@ else
 ASTERISK_CONF_OPTS += --without-ssl
 endif
 
+ifeq ($(BR2_PACKAGE_LIBXCRYPT),y)
+# --with-crypt is unconditional, relies on the C library if present
+ASTERISK_DEPENDENCIES += libxcrypt
+endif
+
 ifeq ($(BR2_PACKAGE_SPEEX)$(BR2_PACKAGE_SPEEXDSP),yy)
 ASTERISK_DEPENDENCIES += speex
 ASTERISK_CONF_OPTS += --with-speex --with-speexdsp