diff --git a/ags-big.patch b/ags-big.patch
new file mode 100644
index 0000000..864c34d
--- /dev/null
+++ b/ags-big.patch
@@ -0,0 +1,13 @@
+diff -up ags-v.3.5.0.25/Common/util/compress.cpp.big ags-v.3.5.0.25/Common/util/compress.cpp
+--- ags-v.3.5.0.25/Common/util/compress.cpp.big	2020-07-12 00:18:03.000000000 +0000
++++ ags-v.3.5.0.25/Common/util/compress.cpp	2020-08-05 14:33:42.303360129 +0000
+@@ -25,6 +25,9 @@
+ #include "util/lzw.h"
+ #include "util/misc.h"
+ #include "util/stream.h"
++#if AGS_PLATFORM_ENDIAN_BIG
++#include "util/bbop.h"
++#endif
+ 
+ using namespace AGS::Common;
+ 
diff --git a/ags.spec b/ags.spec
index a09adda..1f02761 100644
--- a/ags.spec
+++ b/ags.spec
@@ -16,6 +16,8 @@ Patch2:  %{name}-use-system-freetype.patch
 Patch3:  %{name}-gcc10.patch
 # use dynamic linking for dumb
 Patch4:  %{name}-dynamic-dumb.patch
+# fix compilation on big-endian (missing include)
+Patch5:  %{name}-big.patch
 License: Artistic 2.0 and BSD and Giftware and LGPLv2+ and Public Domain and zlib
 BuildRequires: alfont-devel
 BuildRequires: allegro-devel
@@ -61,6 +63,7 @@ since continued to be developed by contributors.
 %patch2 -p1 -b .noft
 %patch3 -p1 -b .gcc10
 %patch4 -p1 -b .dynamic
+%patch5 -p1 -b .big
 # delete unused bundled stuff
 pushd Common/libinclude
 rm -r internal
@@ -101,6 +104,7 @@ make V=1 -C Engine PREFIX=%{buildroot}%{_prefix} install
 - fix compilation with GCC10 (missing cstdio includes)
 - unbundle freetype
 - fix linking against system libdumb
+- fix compilation on big-endian (missing include)
 
 * Fri Jul 31 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.4.4.2-4
 - Second attempt - Rebuilt for