diff --git a/vtun.spec b/vtun.spec
index 7b5a4b9..f3c6489 100644
--- a/vtun.spec
+++ b/vtun.spec
@@ -1,6 +1,6 @@
 Name: vtun
 Version: 3.0.3
-Release: 12%{?dist}
+Release: 13%{?dist}
 Summary: Virtual tunnel over TCP/IP networks
 License: GPLv2+
 Group: System Environment/Daemons
@@ -35,7 +35,10 @@ require modification to any kernel parts.
 
 %build
 %{__autoconf}
-%configure
+# FIXME: Package suffers from c11/inline issues.
+# Workaround by appending --std=gnu89 to CFLAGS
+# Proper fix would be to fix the source-code
+%configure CFLAGS="${RPM_OPT_FLAGS} --std=gnu89"
 make %{?_smp_mflags}
 
 %install
@@ -68,6 +71,10 @@ make install DESTDIR=%{buildroot} INSTALL_OWNER= INSTALL="/usr/bin/install -p"
 %{_mandir}/man8/vtund.8*
 
 %changelog
+* Mon Jun 22 2015 Ralf Corsépius <corsepiu@fedoraproject.org> - 3.0.3-13
+- Append --stdc=gnu89 to CFLAGS (Work-around to c11/inline compatibility
+  issues. Fix FTBFS).
+
 * Fri Jun 19 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 3.0.3-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild