diff -Nru mongrel2-1.12.2/debian/changelog mongrel2-1.12.2/debian/changelog
--- mongrel2-1.12.2/debian/changelog	2020-01-15 19:29:16.000000000 +0000
+++ mongrel2-1.12.2/debian/changelog	2020-07-23 09:31:27.000000000 +0000
@@ -1,3 +1,9 @@
+mongrel2 (1.12.2-3) unstable; urgency=medium
+
+  * Fix build with gcc-10 (Closes: Bug#957560)
+
+ -- Jan Niehusmann <jan@debian.org>  Thu, 23 Jul 2020 11:31:27 +0200
+
 mongrel2 (1.12.2-2) unstable; urgency=medium
 
   * Fix crash when reading websocket packet after deliver task has stopped
diff -Nru mongrel2-1.12.2/debian/patches/debian-changes mongrel2-1.12.2/debian/patches/debian-changes
--- mongrel2-1.12.2/debian/patches/debian-changes	2020-01-15 19:29:16.000000000 +0000
+++ mongrel2-1.12.2/debian/patches/debian-changes	2020-07-23 09:31:27.000000000 +0000
@@ -130,6 +130,15 @@
  #endif
 --- mongrel2-1.12.2.orig/src/unixy.h
 +++ mongrel2-1.12.2/src/unixy.h
+@@ -38,7 +38,7 @@
+ #include <bstring.h>
+ #include <unistd.h>
+ 
+-char *m2program;
++extern char *m2program;
+ 
+ int Unixy_chroot(bstring path);
+ 
 @@ -46,8 +46,6 @@ int Unixy_in_chroot();
  
  int Unixy_drop_priv(bstring path);