diff --git a/0ad.changes b/0ad.changes
index b708c40..310009e 100644
--- a/0ad.changes
+++ b/0ad.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat Mar 25 20:11:43 UTC 2023 - Aaron Puchert <aaronpuchert@alice-dsl.net>
+
+- Add fix-gcc13-build.patch to fix build with GCC 13.
+
 -------------------------------------------------------------------
 Mon Sep 26 21:28:24 UTC 2022 - C J <c.j@tuta.io>
 
diff --git a/0ad.spec b/0ad.spec
index 0985f12..7bd2cf1 100644
--- a/0ad.spec
+++ b/0ad.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package 0ad
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -46,6 +46,8 @@ Patch1:         no-version-check.patch
 Patch2:         PrepareZoneForGC.patch
 # PATCH-FIX-OPENSUSE -- Skip automatic addition of an RPATH.
 Patch3:         premake-no-automatic-rpath.patch
+# PATCH-FIX-UPSTREAM -- Fix build with GCC 13
+Patch4:         fix-gcc13-build.patch
 BuildRequires:  cmake
 BuildRequires:  gcc-c++
 BuildRequires:  libXcursor-devel
@@ -97,6 +99,7 @@ flexible game engine.
 %setup -q -n %{name}-%{version}-alpha
 %patch0 -p1
 %patch3 -p1
+%patch4 -p1
 %if %{with system_mozjs}
 %patch1 -p1
 %patch2 -p1
diff --git a/fix-gcc13-build.patch b/fix-gcc13-build.patch
new file mode 100644
index 0000000..1a17741
--- /dev/null
+++ b/fix-gcc13-build.patch
@@ -0,0 +1,13 @@
+diff --git a/source/tools/atlas/GameInterface/Messages.h b/source/tools/atlas/GameInterface/Messages.h
+index 2fa4780..515ae94 100644
+--- a/source/tools/atlas/GameInterface/Messages.h
++++ b/source/tools/atlas/GameInterface/Messages.h
+@@ -212,7 +212,7 @@ QUERY(GetCurrentMapSize,
+ QUERY(RasterizeMinimap,
+ 		,
+ 		((int, dimension))
+-		((std::vector<uint8_t>, imageBytes))
++		((std::vector<unsigned char>, imageBytes))
+ 		);
+ 
+ QUERY(GetRMSData,