diff -Nru slop-7.5/debian/changelog slop-7.5/debian/changelog
--- slop-7.5/debian/changelog	2020-05-11 03:36:44.000000000 +0000
+++ slop-7.5/debian/changelog	2021-10-05 14:07:33.000000000 +0000
@@ -1,3 +1,10 @@
+slop (7.5-1+rpi1) bookworm-staging; urgency=medium
+
+  * Apply upstream patch to fix missing header and hence fix FTBFS
+    (Closes: 994824)
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Tue, 05 Oct 2021 14:07:33 +0000
+
 slop (7.5-1) unstable; urgency=medium
 
   * New upstrem release
diff -Nru slop-7.5/debian/patches/add-missing-header.patch slop-7.5/debian/patches/add-missing-header.patch
--- slop-7.5/debian/patches/add-missing-header.patch	1970-01-01 00:00:00.000000000 +0000
+++ slop-7.5/debian/patches/add-missing-header.patch	2021-10-05 14:06:45.000000000 +0000
@@ -0,0 +1,20 @@
+commit 5cbcb9e389a02d6288f90a790c6b547d9f9dcac7
+Author: Drunkard Zhang <gongfan193@gmail.com>
+Date:   Tue Sep 28 12:20:25 2021 +0800
+
+    bugfix: add missed header
+    
+    XDestroyImage is included in <X11/Xutil.h> which belongs to libX11.
+    Build fails without include this header on Gentoo.
+    
+    Signed-off-by: Drunkard Zhang <gongfan193@gmail.com>
+
+diff --git a/src/framebuffer.cpp b/src/framebuffer.cpp
+index 20909b3..da85a25 100644
+--- a/src/framebuffer.cpp
++++ b/src/framebuffer.cpp
+@@ -1,3 +1,4 @@
++#include <X11/Xutil.h>
+ #include "framebuffer.hpp"
+ 
+ slop::Framebuffer::Framebuffer( int w, int h ) {
diff -Nru slop-7.5/debian/patches/series slop-7.5/debian/patches/series
--- slop-7.5/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ slop-7.5/debian/patches/series	2021-10-05 14:07:02.000000000 +0000
@@ -0,0 +1 @@
+add-missing-header.patch