diff -Nru mono-tools-4.2/debian/changelog mono-tools-4.2/debian/changelog
--- mono-tools-4.2/debian/changelog	2018-02-19 01:36:54.000000000 +0000
+++ mono-tools-4.2/debian/changelog	2019-02-15 20:16:04.000000000 +0000
@@ -1,3 +1,10 @@
+mono-tools (4.2-3) unstable; urgency=medium
+
+  * [2e576f3] We know what we're doing - don't fail due to obsolete
+    SharpZipLib warning (Closes: #921793)
+
+ -- Jo Shields <joshield@microsoft.com>  Fri, 15 Feb 2019 15:16:04 -0500
+
 mono-tools (4.2-2.2) unstable; urgency=medium
 
   * Non-maintainer upload.
diff -Nru mono-tools-4.2/debian/patches/dont_warnaserror_on_ziplib.patch mono-tools-4.2/debian/patches/dont_warnaserror_on_ziplib.patch
--- mono-tools-4.2/debian/patches/dont_warnaserror_on_ziplib.patch	1970-01-01 00:00:00.000000000 +0000
+++ mono-tools-4.2/debian/patches/dont_warnaserror_on_ziplib.patch	2019-02-15 19:57:43.000000000 +0000
@@ -0,0 +1,11 @@
+Index: mono-tools/gendarme/options.make
+===================================================================
+--- mono-tools.orig/gendarme/options.make
++++ mono-tools/gendarme/options.make
+@@ -2,5 +2,5 @@
+ COMMON_OPTIONS := -debug+ -d:TRACE $(if $(DEBUG),-d:DEBUG -checked+,-optimize+)
+ COMMON_OPTIONS += -nowarn:1591	# Missing XML comment
+ 
+-GENDARME_OPTIONS := $(COMMON_OPTIONS) -warn:4 -warnaserror+
++GENDARME_OPTIONS := $(COMMON_OPTIONS) -warn:4 -warnaserror+ -warnaserror-:CS0618 
+ TESTS_OPTIONS := $(COMMON_OPTIONS) -warn:0
diff -Nru mono-tools-4.2/debian/patches/series mono-tools-4.2/debian/patches/series
--- mono-tools-4.2/debian/patches/series	2018-02-19 01:36:54.000000000 +0000
+++ mono-tools-4.2/debian/patches/series	2019-02-15 19:57:32.000000000 +0000
@@ -1,2 +1,3 @@
+dont_warnaserror_on_ziplib.patch
 00-fix_build_system.patch
 use-system-cecil-not-private-cecil.patch