diff --git a/gnaural.spec b/gnaural.spec
index ade4591..9744ee2 100644
--- a/gnaural.spec
+++ b/gnaural.spec
@@ -1,6 +1,6 @@
 Name:           gnaural
 Version:        1.0.20110606
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        A multi-platform programmable binaural-beat generator
 License:        GPLv2+
 URL:            http://gnaural.sourceforge.net
@@ -24,6 +24,10 @@ between many users.
 %setup -q
 
 %build
+# FIXME: Package suffers from c11/inline issues
+# Workaround by appending -std=gnu89 to CFLAGS
+# Proper fix would be to fix the source-code
+CFLAGS="${RPM_OPT_FLAGS} -std=gnu89"
 %configure
 make %{?_smp_mflags}
 
@@ -73,6 +77,10 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 %{_datadir}/icons/hicolor/*x*/apps/%{name}*.png
 
 %changelog
+* Sat Jul 04 2015 Ralf Corsépius <corsepiu@fedoraproject.org> - 1.0.20110606-5
+- Append -stdc=gnu89 to CFLAGS (Work-around to c11/inline compatibility
+  issues. Fix FTBFS).
+
 * Wed Jun 17 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.0.20110606-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild