diff --git a/libao-nanosleep.patch b/libao-nanosleep.patch
new file mode 100644
index 0000000..c8ceb05
--- /dev/null
+++ b/libao-nanosleep.patch
@@ -0,0 +1,18 @@
+commit 1f998f5d6d77674dad01b181811638578ad68242
+Author: Tristan Matthews <tmatth@videolan.org>
+Date:   Sun Jan 15 12:15:07 2017 -0500
+
+    pulse: fix missing include warning for nanosleep
+
+diff --git a/src/plugins/pulse/ao_pulse.c b/src/plugins/pulse/ao_pulse.c
+index 9835273b53c35bf9..2d10d57f17f6bdd6 100644
+--- a/src/plugins/pulse/ao_pulse.c
++++ b/src/plugins/pulse/ao_pulse.c
+@@ -30,6 +30,7 @@
+ #include <assert.h>
+ #include <string.h>
+ #include <signal.h>
++#include <time.h>
+ #include <limits.h>
+ 
+ #include <pulse/pulseaudio.h>
diff --git a/libao.spec b/libao.spec
index c6728ad..71cc0a1 100644
--- a/libao.spec
+++ b/libao.spec
@@ -1,6 +1,6 @@
 Name:           libao
 Version:        1.2.0
-Release:        15%{?dist}
+Release:        16%{?dist}
 Summary:        Cross Platform Audio Output Library
 License:        GPLv2+
 URL:            http://xiph.org/ao/
@@ -9,6 +9,7 @@ Patch1:         0001-ao_pulse.c-fix-latency-calculation.patch
 # https://gitlab.xiph.org/xiph/libao/commit/d5221655dfd1a2156aa6be83b5aadea7c1e0f5bd.diff
 # CVE 2017-11548
 Patch2:         d5221655dfd1a2156aa6be83b5aadea7c1e0f5bd.diff
+Patch3:         libao-nanosleep.patch
 BuildRequires:  gcc
 BuildRequires:  alsa-lib-devel
 BuildRequires:  pkgconfig(libpulse)
@@ -31,6 +32,7 @@ developing applications that use %{name}.
 %setup -q
 %patch1 -p1
 %patch2 -p1
+%patch3 -p1
 sed -i "s/-O20 -ffast-math//" configure
 
 
@@ -67,6 +69,9 @@ rm -rf $RPM_BUILD_ROOT%{_docdir}/%{name}*
 
 
 %changelog
+* Mon Sep  9 2019 Florian Weimer <fweimer@redhat.com> - 1.2.0-16
+- Fix building in C99 mode
+
 * Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 1.2.0-15
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild