diff --git a/.gitignore b/.gitignore
index 7ff3efe..b15c325 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /meson-0.49.2.tar.gz
 /meson-0.50.0.tar.gz
 /meson-0.50.1.tar.gz
+/meson-0.51.1.tar.gz
diff --git a/0001-compilers-n_debug-if-release-and-buildtype-plain-sho.patch b/0001-compilers-n_debug-if-release-and-buildtype-plain-sho.patch
deleted file mode 100644
index 1522056..0000000
--- a/0001-compilers-n_debug-if-release-and-buildtype-plain-sho.patch
+++ /dev/null
@@ -1,42 +0,0 @@
-From d88bf0eb80e2531a8017de4efd4eb02f1e3081ec Mon Sep 17 00:00:00 2001
-From: Dylan Baker <dylan@pnwbakers.com>
-Date: Mon, 25 Mar 2019 11:35:18 -0700
-Subject: [PATCH] compilers: n_debug=if-release and buildtype=plain should not
- enable assertions
-
-It's a bit odd that it doesn't, and has resulted in bugs in distro
-packaging.
-
-Fixes #5141
----
- docs/markdown/snippets/debug-if-release-plain.md | 4 ++++
- mesonbuild/compilers/compilers.py                | 2 +-
- 2 files changed, 5 insertions(+), 1 deletion(-)
- create mode 100644 docs/markdown/snippets/debug-if-release-plain.md
-
-diff --git a/docs/markdown/snippets/debug-if-release-plain.md b/docs/markdown/snippets/debug-if-release-plain.md
-new file mode 100644
-index 00000000..013e6c83
---- /dev/null
-+++ b/docs/markdown/snippets/debug-if-release-plain.md
-@@ -0,0 +1,4 @@
-+## n_debug=if-release and buildtype=plain means no asserts
-+
-+Previously if this combination was used then assertions were enabled,
-+which is fairly surprising behavior.
-diff --git a/mesonbuild/compilers/compilers.py b/mesonbuild/compilers/compilers.py
-index da029806..66195dc1 100644
---- a/mesonbuild/compilers/compilers.py
-+++ b/mesonbuild/compilers/compilers.py
-@@ -510,7 +510,7 @@ def get_base_compile_args(options, compiler):
-     try:
-         if (options['b_ndebug'].value == 'true' or
-                 (options['b_ndebug'].value == 'if-release' and
--                 options['buildtype'].value == 'release')):
-+                 options['buildtype'].value in {'release', 'plain'})):
-             args += ['-DNDEBUG']
-     except KeyError:
-         pass
--- 
-2.21.0
-
diff --git a/meson.spec b/meson.spec
index f9edcf9..439324c 100644
--- a/meson.spec
+++ b/meson.spec
@@ -1,15 +1,13 @@
 %global libname mesonbuild
 
 Name:           meson
-Version:        0.50.1
+Version:        0.51.1
 Release:        1%{?dist}
 Summary:        High productivity build system
 
 License:        ASL 2.0
-URL:            http://mesonbuild.com/
+URL:            https://mesonbuild.com/
 Source:         https://github.com/mesonbuild/meson/archive/%{version}/%{name}-%{version}.tar.gz
-# https://github.com/mesonbuild/meson/commit/d88bf0eb80e2531a8017de4efd4eb02f1e3081ec
-Patch0001:      0001-compilers-n_debug-if-release-and-buildtype-plain-sho.patch
 
 BuildArch:      noarch
 
@@ -48,6 +46,9 @@ install -Dpm0644 -t %{buildroot}%{_rpmmacrodir} data/macros.%{name}
 %{_datadir}/polkit-1/actions/com.mesonbuild.install.policy
 
 %changelog
+* Wed Jul 10 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.51.1-1
+- Update to 0.51.1
+
 * Wed Apr 17 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.50.1-1
 - Update to 0.50.1
 
diff --git a/sources b/sources
index d664e71..6403122 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (meson-0.50.1.tar.gz) = 44d07204e8971c3e78f189c912d3c1e4fe48084335eb7cd15c7cb6d87d034b852181f0fbb2f8a07fbeb56f7312233157e9d575204d3e1f6d46d6bc076e4c67fc
+SHA512 (meson-0.51.1.tar.gz) = 4fbd5bcef1d51a25110ddda83f00b988145ee3f90500db7d3112ad6f28274e5ad95fc30cb04e486ad3b59701162d82ec7ad128d6b9e7d202a351b7a4b8683d4e