diff -Nru jumpnbump-1.60/debian/changelog jumpnbump-1.60/debian/changelog
--- jumpnbump-1.60/debian/changelog	2019-01-13 19:37:56.000000000 +0000
+++ jumpnbump-1.60/debian/changelog	2021-04-27 17:13:00.000000000 +0000
@@ -1,3 +1,10 @@
+jumpnbump (1.60-4+rpi1) buster-staging; urgency=medium
+
+  * Apply upstream fix to prevent crash on systems where char is unsigned.
+    (Closes: 987333)
+
+ -- Peter Michael Green <plugwash@debian.org>  Tue, 27 Apr 2021 17:13:00 +0000
+
 jumpnbump (1.60-4) unstable; urgency=medium
 
   * Fix debian/watch file.
diff -Nru jumpnbump-1.60/debian/patches/0018-Fix-char-signedness.patch jumpnbump-1.60/debian/patches/0018-Fix-char-signedness.patch
--- jumpnbump-1.60/debian/patches/0018-Fix-char-signedness.patch	1970-01-01 00:00:00.000000000 +0000
+++ jumpnbump-1.60/debian/patches/0018-Fix-char-signedness.patch	2021-04-27 17:10:59.000000000 +0000
@@ -0,0 +1,32 @@
+commit 8a6873baa395f16048c6865f7036650a3b2bbe76
+Author: Frank Birbacher <frank.birbacher@gmail.com>
+Date:   Sun Dec 27 12:59:33 2020 +0000
+
+    Fix dj channel signedness
+
+diff --git a/dj.h b/dj.h
+index 07f4a32..985548b 100644
+--- a/dj.h
++++ b/dj.h
+@@ -115,7 +115,7 @@ extern void dj_mix(void);
+ extern char dj_set_num_sfx_channels(char num_channels);
+ extern void dj_set_sfx_volume(char volume);
+ extern char dj_get_sfx_volume(void);
+-extern void dj_play_sfx(unsigned char sfx_num, unsigned short freq, char volume, char panning, unsigned short delay, char channel);
++extern void dj_play_sfx(unsigned char sfx_num, unsigned short freq, char volume, char panning, unsigned short delay, signed char channel);
+ extern char dj_get_sfx_settings(unsigned char sfx_num, sfx_data *data);
+ extern char dj_set_sfx_settings(unsigned char sfx_num, sfx_data *data);
+ extern void dj_set_sfx_channel_volume(char channel_num, char volume);
+diff --git a/sdl/sound.c b/sdl/sound.c
+index ff1ee7e..4ea56af 100644
+--- a/sdl/sound.c
++++ b/sdl/sound.c
+@@ -357,7 +357,7 @@ void dj_set_sfx_volume(char volume)
+ 	SDL_UnlockAudio();
+ }
+ 
+-void dj_play_sfx(unsigned char sfx_num, unsigned short freq, char volume, char panning, unsigned short delay, char channel)
++void dj_play_sfx(unsigned char sfx_num, unsigned short freq, char volume, char panning, unsigned short delay, signed char channel)
+ {
+ 	int slot;
+ 
diff -Nru jumpnbump-1.60/debian/patches/series jumpnbump-1.60/debian/patches/series
--- jumpnbump-1.60/debian/patches/series	2019-01-13 19:35:33.000000000 +0000
+++ jumpnbump-1.60/debian/patches/series	2021-04-27 17:11:47.000000000 +0000
@@ -8,3 +8,4 @@
 0008-Add-the-screenshot-in-README.md.patch
 0009-do-not-build-and-install-jumpnbump-menu-by-default-a.patch
 0010-install-AppStream-metadata-into-the-proper-location.patch
+0018-Fix-char-signedness.patch