diff --git a/chromium-gcc8-alignof.patch b/chromium-gcc8-alignof.patch
new file mode 100644
index 0000000..746783e
--- /dev/null
+++ b/chromium-gcc8-alignof.patch
@@ -0,0 +1,25 @@
+From: Fedora
+Subject: Fix build for 32-bit platforms
+
+Apparently not upstream, can't find this anywhere. So I assume Fedora is the actual source?
+https://src.fedoraproject.org/cgit/rpms/chromium.git/tree/chromium-66.0.3359.170-gcc8-alignof.patch
+
+Index: chromium-69.0.3497.81/mojo/public/c/system/macros.h
+===================================================================
+--- chromium-69.0.3497.81.orig/mojo/public/c/system/macros.h
++++ chromium-69.0.3497.81/mojo/public/c/system/macros.h
+@@ -27,7 +27,13 @@
+   (sizeof(void*) == 4 ? 32 : 0)
+ 
+ // Like the C++11 |alignof| operator.
+-#if __cplusplus >= 201103L
++#if defined(__GNUC__) && __GNUC__ >= 8
++// GCC 8 has changed the alignof operator to return the minimal alignment
++// required by the target ABI, instead of the preferred alignment.
++// This means that on 32-bit x86, it will return 4 instead of 8.
++// Use __alignof__ instead to avoid this.
++#define MOJO_ALIGNOF(type) __alignof__(type)
++#elif __cplusplus >= 201103L
+ #define MOJO_ALIGNOF(type) alignof(type)
+ #elif defined(__GNUC__)
+ #define MOJO_ALIGNOF(type) __alignof__(type)
diff --git a/chromium.changes b/chromium.changes
index 6ba8053..1e08eee 100644
--- a/chromium.changes
+++ b/chromium.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Sep  6 13:27:18 UTC 2018 - tchvatal@suse.com
+
+- Add patch to fix mojo build on 32bit:
+  * chromium-gcc8-alignof.patch
+
 -------------------------------------------------------------------
 Thu Sep  6 09:13:49 UTC 2018 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/chromium.spec b/chromium.spec
index f6d4f81..c626f40 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -74,6 +74,7 @@ Patch10:        chromium-skia-aarch64-buildfix.patch
 Patch11:        chromium-vpx-aarch64.patch
 Patch12:        chromium-system-icu.patch
 Patch13:        chromium-old-glibc.patch
+Patch14:        chromium-gcc8-alignof.patch
 # Google seem not too keen on merging this but GPU accel is quite important
 #  https://chromium-review.googlesource.com/c/chromium/src/+/532294
 #  https://github.com/saiarcot895/chromium-ubuntu-build/tree/master/debian/patches