diff -Nru gcc-mingw-w64-20.2/debian/changelog gcc-mingw-w64-20.2build1/debian/changelog
--- gcc-mingw-w64-20.2/debian/changelog	2018-01-24 22:21:56.000000000 +0000
+++ gcc-mingw-w64-20.2build1/debian/changelog	2018-03-12 16:25:30.000000000 +0000
@@ -1,3 +1,9 @@
+gcc-mingw-w64 (20.2build1) bionic; urgency=medium
+
+  * No-change rebuild for libisl soname bump.
+
+ -- Matthias Klose <doko@ubuntu.com>  Mon, 12 Mar 2018 17:25:30 +0100
+
 gcc-mingw-w64 (20.2) unstable; urgency=medium
 
   * Adjust to build with gcc-7-source 7.2.0-20 (closes: #888317).
diff -Nru gcc-mingw-w64-20.2/debian/control gcc-mingw-w64-20.2build1/debian/control
--- gcc-mingw-w64-20.2/debian/control	2018-01-24 22:21:56.000000000 +0000
+++ gcc-mingw-w64-20.2build1/debian/control	2018-03-12 16:25:30.000000000 +0000
@@ -4,8 +4,8 @@
 Section: devel
 Priority: optional
 Build-Depends: autotools-dev,
-               binutils-mingw-w64-i686 (>= 2.28~),
-               binutils-mingw-w64-x86-64 (>= 2.28~),
+               binutils-mingw-w64-i686 (>= 2.30~),
+               binutils-mingw-w64-x86-64 (>= 2.30~),
                bison,
                debhelper,
                flex,
diff -Nru gcc-mingw-w64-20.2/debian/control.source gcc-mingw-w64-20.2build1/debian/control.source
--- gcc-mingw-w64-20.2/debian/control.source	2018-01-24 22:20:41.000000000 +0000
+++ gcc-mingw-w64-20.2build1/debian/control.source	2018-03-12 16:25:30.000000000 +0000
@@ -3,8 +3,8 @@
 Section: devel
 Priority: optional
 Build-Depends: autotools-dev,
-               binutils-mingw-w64-i686 (>= 2.28~),
-               binutils-mingw-w64-x86-64 (>= 2.28~),
+               binutils-mingw-w64-i686 (>= 2.30~),
+               binutils-mingw-w64-x86-64 (>= 2.30~),
                bison,
                debhelper,
                flex,