diff --git a/srcpkgs/opensmtpd-extras/patches/fix-musl.patch b/srcpkgs/opensmtpd-extras/patches/fix-musl.patch
new file mode 100644
index 00000000000..2f67db60858
--- /dev/null
+++ b/srcpkgs/opensmtpd-extras/patches/fix-musl.patch
@@ -0,0 +1,24 @@
+diff --git a/extras/tables/table-ldap/ber.h b/extras/tables/table-ldap/ber.h
+index d656508..b92656c 100644
+--- extras/tables/table-ldap/ber.h
++++ extras/tables/table-ldap/ber.h
+@@ -75,7 +75,9 @@ struct ber_oid {
+ 	size_t		bo_n;
+ };
+ 
+-__BEGIN_DECLS
++#ifdef __cpluplus
++extern "C" {
++#endif
+ struct ber_element	*ber_get_element(unsigned long);
+ void			 ber_set_header(struct ber_element *, int,
+ 			    unsigned long);
+@@ -123,4 +125,6 @@ size_t			 ber_calc_len(struct ber_element *);
+ void			 ber_set_application(struct ber *,
+ 			    unsigned long (*)(struct ber_element *));
+ void			 ber_free(struct ber *);
+-__END_DECLS
++#ifdef __cpluplus
++}
++#endif
+
diff --git a/srcpkgs/opensmtpd-extras/template b/srcpkgs/opensmtpd-extras/template
new file mode 100644
index 00000000000..28c56a95250
--- /dev/null
+++ b/srcpkgs/opensmtpd-extras/template
@@ -0,0 +1,18 @@
+# Template file for 'opensmtpd-extras'
+pkgname=opensmtpd-extras
+version=6.4.0
+revision=1
+build_style=gnu-configure
+configure_args="--with-table-passwd --with-table-ldap --with-table-mysql
+ --with-table-postgres --with-table-socketmap --with-table-sqlite"
+makedepends="libressl-devel libevent-devel postgresql-libs-devel
+ libmysqlclient-devel sqlite-devel"
+depends="opensmtpd"
+short_desc="Free implementation of the server-side SMTP protocol - extras"
+maintainer="Denis Revin <denis.revin@gmail.com>"
+license="ISC"
+homepage="https://www.opensmtpd.org"
+distfiles="https://www.opensmtpd.org/archives/${pkgname}-${version}.tar.gz"
+checksum=@8f0618d28a6e5d42f9fec190add6d323f1373927fa67b15756644009d0ad3a72
+
+CFLAGS="-D_DEFAULT_SOURCE"