diff -Nru ruby-ncurses-1.4.9/debian/changelog ruby-ncurses-1.4.9/debian/changelog
--- ruby-ncurses-1.4.9/debian/changelog	2018-03-01 09:35:58.000000000 +0000
+++ ruby-ncurses-1.4.9/debian/changelog	2020-06-16 21:55:39.000000000 +0100
@@ -1,3 +1,12 @@
+ruby-ncurses (1.4.9-1ubuntu1) UNRELEASED; urgency=medium
+
+  * Add patch to link against libmenuw
+    Fixes LoadError "ncursesw_bin.so: undefined symbol: set_menu_win"
+    Closes: #1775673, Closes: #1787763
+    Credit: Georg Müller <https://launchpad.net/~georgmueller>
+
+ -- Iain Parris <ip2.vcs@parris.org>  Tue, 16 Jun 2020 21:55:39 +0100
+
 ruby-ncurses (1.4.9-1build3) bionic; urgency=high
 
   * No change rebuild against ruby-defaults without ruby2.3 support.
diff -Nru ruby-ncurses-1.4.9/debian/patches/0003-menuw.patch ruby-ncurses-1.4.9/debian/patches/0003-menuw.patch
--- ruby-ncurses-1.4.9/debian/patches/0003-menuw.patch	1970-01-01 01:00:00.000000000 +0100
+++ ruby-ncurses-1.4.9/debian/patches/0003-menuw.patch	2020-06-16 21:55:29.000000000 +0100
@@ -0,0 +1,13 @@
+Index: ruby-ncurses-1.4.9/extconf.rb
+===================================================================
+--- ruby-ncurses-1.4.9.orig/extconf.rb
++++ ruby-ncurses-1.4.9/extconf.rb
+@@ -153,7 +153,7 @@ end
+ 
+ puts "checking for the menu library..."
+ if have_header("menu.h") or have_header("ncursesw/menu.h")
+-  have_library("menu", "new_menu")
++  have_library("menuw", "new_menu")
+ else
+   raise "menu library not found."
+ end
diff -Nru ruby-ncurses-1.4.9/debian/patches/series ruby-ncurses-1.4.9/debian/patches/series
--- ruby-ncurses-1.4.9/debian/patches/series	2016-03-06 20:36:18.000000000 +0000
+++ ruby-ncurses-1.4.9/debian/patches/series	2020-06-16 21:55:10.000000000 +0100
@@ -1 +1,2 @@
 0002-Absolute-path-to-ruby-interpreter.patch
+0003-menuw.patch