diff --git a/chromium-60.0.3112.90-vulkan-force-c99.patch b/chromium-60.0.3112.90-vulkan-force-c99.patch
new file mode 100644
index 00000000..a4159621
--- /dev/null
+++ b/chromium-60.0.3112.90-vulkan-force-c99.patch
@@ -0,0 +1,11 @@
+diff -up chromium-60.0.3112.90/third_party/angle/src/vulkan_support/BUILD.gn.c99 chromium-60.0.3112.90/third_party/angle/src/vulkan_support/BUILD.gn
+--- chromium-60.0.3112.90/third_party/angle/src/vulkan_support/BUILD.gn.c99	2017-08-14 10:40:48.028799820 -0400
++++ chromium-60.0.3112.90/third_party/angle/src/vulkan_support/BUILD.gn	2017-08-14 10:41:43.054734910 -0400
+@@ -180,6 +180,7 @@ config("vulkan_internal_config") {
+     cflags += [ "-Wno-ignored-attributes" ]
+   }
+   if (is_linux) {
++    cflags = [ "-std=c99" ]
+     defines += [
+       "SYSCONFDIR=\"/etc\"",
+       "FALLBACK_CONFIG_DIRS=\"/etc/xdg\"",
diff --git a/chromium.spec b/chromium.spec
index 40b532b2..8e2d7b06 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -116,7 +116,7 @@ Name:		chromium%{chromium_channel}%{?freeworld:-freeworld}
 Name:		chromium%{chromium_channel}
 %endif
 Version:	%{majorversion}.0.3112.90
-Release:	2%{?dist}
+Release:	3%{?dist}
 Summary:	A WebKit (Blink) powered web browser
 Url:		http://www.chromium.org/Home
 License:	BSD and LGPLv2+ and ASL 2.0 and IJG and MIT and GPLv2+ and ISC and OpenSSL and (MPLv1.1 or GPLv2 or LGPLv2)
@@ -197,8 +197,9 @@ Patch43:	chromium-60.0.3112.78-jpeg-nomangle.patch
 Patch44:	chromium-60.0.3112.78-gtk2fix.patch
 # Do not mangle zlib
 Patch45:	chromium-60.0.3112.78-no-zlib-mangle.patch
-# Apply this change to work around EPEL7 compiler issues
+# Apply these changes to work around EPEL7 compiler issues
 Patch46:	chromium-60.0.3112.90-init-list-hack.patch
+Patch47:	chromium-60.0.3112.90-vulkan-force-c99.patch
 
 
 ### Chromium Tests Patches ###
@@ -629,6 +630,7 @@ udev.
 %patch45 -p1 -b .nozmangle
 %if 0%{?rhel} == 7
 %patch46 -p1 -b .oldgcc
+%patch47 -p1 -b .c99
 %endif
 
 ### Chromium Tests Patches ###
@@ -1837,6 +1839,9 @@ getent group chrome-remote-desktop >/dev/null || groupadd -r chrome-remote-deskt
 
 
 %changelog
+* Mon Aug 14 2017 Tom Callaway <spot@fedoraproject.org> 60.0.3112.90-3
+- apply more workarounds to coax code to build with epel7 gcc
+
 * Wed Aug  9 2017 Tom Callaway <spot@fedoraproject.org> 60.0.3112.90-2
 - apply post 60 code commit to get code building on epel7