diff -Nru libsoxr-0.1.3/debian/changelog libsoxr-0.1.3/debian/changelog
--- libsoxr-0.1.3/debian/changelog	2019-09-09 18:28:47.000000000 +0000
+++ libsoxr-0.1.3/debian/changelog	2019-10-07 23:54:42.000000000 +0000
@@ -1,3 +1,10 @@
+libsoxr (0.1.3-1+rpi1) bullseye-staging; urgency=medium
+
+  * Disable neon until upstream clarifies whether it is behind runtime CPU
+    detection.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Mon, 07 Oct 2019 23:54:42 +0000
+
 libsoxr (0.1.3-1) unstable; urgency=medium
 
   * Team upload.
diff -Nru libsoxr-0.1.3/debian/patches/disable-neon.patch libsoxr-0.1.3/debian/patches/disable-neon.patch
--- libsoxr-0.1.3/debian/patches/disable-neon.patch	1970-01-01 00:00:00.000000000 +0000
+++ libsoxr-0.1.3/debian/patches/disable-neon.patch	2019-10-07 23:54:42.000000000 +0000
@@ -0,0 +1,20 @@
+Description: Disable neon until upstream clarifies whether it is behind runtime CPU  detection.
+Author: Peter Michael Green <plugwash@raspbian.org>
+
+--- libsoxr-0.1.3.orig/cmake/Modules/FindSIMD32.cmake
++++ libsoxr-0.1.3/cmake/Modules/FindSIMD32.cmake
+@@ -12,10 +12,10 @@ if (DEFINED SIMD32_C_FLAGS)
+ elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
+   set (TRIAL_C_FLAGS
+     # Gcc
+-    "-mfpu=neon-vfpv4 -mcpu=cortex-a7"
+-    "-mfpu=neon       -mfloat-abi=hard"
+-    "-mfpu=neon       -mfloat-abi=softfp"
+-    "-mfpu=neon       -mfloat-abi=soft"
++    "-mxfpu=neon-vfpv4 -mcpu=cortex-a7"
++    "-mxfpu=neon       -mfloat-abi=hard"
++    "-mxfpu=neon       -mfloat-abi=softfp"
++    "-mxfpu=neon       -mfloat-abi=soft"
+   )
+   set (TEST_C_SOURCE "
+     #include <arm_neon.h>
diff -Nru libsoxr-0.1.3/debian/patches/series libsoxr-0.1.3/debian/patches/series
--- libsoxr-0.1.3/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ libsoxr-0.1.3/debian/patches/series	2019-10-07 23:54:42.000000000 +0000
@@ -0,0 +1 @@
+disable-neon.patch