diff -Nru altos-1.9.7/debian/changelog altos-1.9.7/debian/changelog
--- altos-1.9.7/debian/changelog	2021-06-09 05:10:20.000000000 +0000
+++ altos-1.9.7/debian/changelog	2021-08-03 15:44:09.000000000 +0000
@@ -1,3 +1,9 @@
+altos (1.9.7-2) unstable; urgency=medium
+
+  * pull in fix from master branch for gcc-10 compilation, closes: #991800
+
+ -- Bdale Garbee <bdale@gag.com>  Tue, 03 Aug 2021 09:44:09 -0600
+
 altos (1.9.7-1) unstable; urgency=medium
 
   [ Keith Packard ]
diff -Nru altos-1.9.7/debian/patches/fixes-for-gcc-10.diff altos-1.9.7/debian/patches/fixes-for-gcc-10.diff
--- altos-1.9.7/debian/patches/fixes-for-gcc-10.diff	1970-01-01 00:00:00.000000000 +0000
+++ altos-1.9.7/debian/patches/fixes-for-gcc-10.diff	2021-08-03 15:44:09.000000000 +0000
@@ -0,0 +1,21 @@
+--- altos-1.9.7.orig/src/lpc/lpc.h
++++ altos-1.9.7/src/lpc/lpc.h
+@@ -868,7 +868,7 @@ struct lpc_usb {
+ 	vuint32_t	introuting;
+ 	uint32_t	r30;
+ 	vuint32_t	eptoggle;
+-} lpc_usb;
++};
+ 
+ extern struct lpc_usb lpc_usb;
+ #define lpc_usb (*(struct lpc_usb *) 0x40080000)
+--- altos-1.9.7.orig/src/micropeak-v2.0/ao_micro.c
++++ altos-1.9.7/src/micropeak-v2.0/ao_micro.c
+@@ -23,7 +23,6 @@
+ #include <ao_report_micro.h>
+ #include <ao_log_micro.h>
+ 
+-uint32_t 	pa;
+ alt_t		ground_alt, max_alt;
+ alt_t		ao_max_height;
+ 
diff -Nru altos-1.9.7/debian/patches/series altos-1.9.7/debian/patches/series
--- altos-1.9.7/debian/patches/series	2021-06-09 05:10:20.000000000 +0000
+++ altos-1.9.7/debian/patches/series	2021-08-03 15:44:09.000000000 +0000
@@ -0,0 +1 @@
+fixes-for-gcc-10.diff