diff -Nru ros-opencv-apps-1.12.0/debian/changelog ros-opencv-apps-1.12.0/debian/changelog
--- ros-opencv-apps-1.12.0/debian/changelog	2019-10-20 21:29:37.000000000 +0000
+++ ros-opencv-apps-1.12.0/debian/changelog	2019-11-03 14:51:51.000000000 +0000
@@ -1,3 +1,9 @@
+ros-opencv-apps (1.12.0-3~rpi1) bullseye; urgency=medium
+
+  * Disable opencv 4 patch for now.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sun, 03 Nov 2019 14:51:51 +0000
+
 ros-opencv-apps (1.12.0-3) unstable; urgency=medium
 
   * Drop Python 2 package (Closes: #938387)
diff -Nru ros-opencv-apps-1.12.0/debian/patches/series ros-opencv-apps-1.12.0/debian/patches/series
--- ros-opencv-apps-1.12.0/debian/patches/series	2019-10-20 21:28:38.000000000 +0000
+++ ros-opencv-apps-1.12.0/debian/patches/series	2019-11-03 14:51:51.000000000 +0000
@@ -1,4 +1,4 @@
 0001-Add-Debian-specific-SOVERSION.patch
 71.diff
 0003-Switch-to-Python-3.patch
-0004-Port-to-OpenCV-4.patch
+#0004-Port-to-OpenCV-4.patch