diff --git a/build/unix/build-clang/build-clang.py b/build/unix/build-clang/build-clang.py
index a51dba19cc4a..d47584a79c24 100755
--- a/build/unix/build-clang/build-clang.py
+++ b/build/unix/build-clang/build-clang.py
@@ -3,7 +3,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-llvm_revision = "158160"
+llvm_revision = "159219"
 moz_version = "moz0"
 
 ##############################################
@@ -96,10 +96,7 @@ if not os.path.exists(source_dir):
            compiler_rt_source_dir, llvm_revision)
     os.symlink("../../clang", llvm_source_dir + "/tools/clang")
     os.symlink("../../compiler-rt", llvm_source_dir + "/projects/compiler-rt")
-    if isDarwin:
-        patch("clang-no-ios.patch", 0, clang_source_dir)
-        patch("compiler-rt-no-ios.patch", 0, compiler_rt_source_dir)
-    else:
+    if not isDarwin:
         patch("old-ld-hack.patch", 1, llvm_source_dir)
         patch("compiler-rt-gnu89-inline.patch", 0, compiler_rt_source_dir)
 
diff --git a/build/unix/build-clang/clang-no-ios.patch b/build/unix/build-clang/clang-no-ios.patch
deleted file mode 100644
index 6266c2a99dfa..000000000000
--- a/build/unix/build-clang/clang-no-ios.patch
+++ /dev/null
@@ -1,15 +0,0 @@
-Index: runtime/compiler-rt/Makefile
-===================================================================
---- runtime/compiler-rt/Makefile	(revision 157958)
-+++ runtime/compiler-rt/Makefile	(working copy)
-@@ -74,8 +74,8 @@
- ifeq ($(OS),Darwin)
- RuntimeDirs += darwin
- RuntimeLibrary.darwin.Configs := \
--	eprintf 10.4 osx ios cc_kext \
--	asan_osx profile_osx profile_ios
-+	eprintf 10.4 osx  \
-+	asan_osx profile_osx
- endif
- 
- # On Linux, include a library which has all the runtime functions.
diff --git a/build/unix/build-clang/compiler-rt-no-ios.patch b/build/unix/build-clang/compiler-rt-no-ios.patch
deleted file mode 100644
index dd5cdcd1ce2e..000000000000
--- a/build/unix/build-clang/compiler-rt-no-ios.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-Index: make/platform/clang_darwin.mk
-===================================================================
---- make/platform/clang_darwin.mk	(revision 157958)
-+++ make/platform/clang_darwin.mk	(working copy)
-@@ -47,7 +47,7 @@
- # Configuration for targetting iOS, for some ARMv6 functions, which must be
- # in the same linkage unit, and for a couple of other functions that didn't
- # make it into libSystem.
--Configs += ios
-+#Configs += ios
- UniversalArchs.ios := $(call CheckArches,i386 x86_64 armv6 armv7,ios)
- 
- # Configuration for targetting OSX. These functions may not be in libSystem
-@@ -56,13 +56,13 @@
- UniversalArchs.osx := $(call CheckArches,i386 x86_64,osx)
- 
- # Configuration for use with kernel/kexts.
--Configs += cc_kext
-+#Configs += cc_kext
- UniversalArchs.cc_kext := $(call CheckArches,armv6 armv7 i386 x86_64,cc_kext)
- 
- # Configurations which define the profiling support functions.
- Configs += profile_osx
- UniversalArchs.profile_osx := $(call CheckArches,i386 x86_64,profile_osx)
--Configs += profile_ios
-+#Configs += profile_ios
- UniversalArchs.profile_ios := $(call CheckArches,i386 x86_64 armv6 armv7,profile_ios)
- 
- # Configurations which define the ASAN support functions.