diff --git a/build/build-clang/README b/build/build-clang/README
index c4342883ba34..eee7f448cf9c 100644
--- a/build/build-clang/README
+++ b/build/build-clang/README
@@ -44,7 +44,7 @@ build-clang.py accepts a JSON config format with the following fields:
 * ranlib: Path to the ranlib tool (optional).
 * libtool: Path to the libtool tool (optional).
 * ld: Path to the linker.
-* patches: Optional list of patches to apply per platform.  Supported platforms: macosx64, linux32, linux64.  The default is Release.
+* patches: Optional list of patches to apply.
 * build_type: The type of build to make.  Supported types: Release, Debug, RelWithDebInfo or MinSizeRel.
 * build_libcxx: Whether to build with libcxx.  The default is false.
 * build_clang_tidy: Whether to build clang-tidy with the Mozilla checks imported.  The default is false.
diff --git a/build/build-clang/build-clang.py b/build/build-clang/build-clang.py
index 5fb493f7105f..8b6c8b3e781c 100755
--- a/build/build-clang/build-clang.py
+++ b/build/build-clang/build-clang.py
@@ -170,24 +170,6 @@ def svn_update(directory, revision):
     run_in(directory, ["svn", "revert", "-q", "-R", revision])
 
 
-def get_platform():
-    p = platform.system()
-    if p == "Darwin":
-        return "macosx64"
-    elif p == "Linux":
-        if platform.architecture() == "AMD64":
-            return "linux64"
-        else:
-            return "linux32"
-    elif p == "Windows":
-        if platform.architecture() == "AMD64":
-            return "win64"
-        else:
-            return "win32"
-    else:
-        raise NotImplementedError("Not supported platform")
-
-
 def is_darwin():
     return platform.system() == "Darwin"
 
@@ -492,7 +474,7 @@ if __name__ == "__main__":
         checkout_or_update(libcxxabi_repo, libcxxabi_source_dir)
     if extra_repo:
         checkout_or_update(extra_repo, extra_source_dir)
-    for p in config.get("patches", {}).get(get_platform(), []):
+    for p in config.get("patches", []):
         patch(p, source_dir)
 
     symlinks = [(source_dir + "/clang",
diff --git a/build/build-clang/clang-static-analysis-linux64.json b/build/build-clang/clang-static-analysis-linux64.json
index 930b65b7fac9..59987f2125dd 100644
--- a/build/build-clang/clang-static-analysis-linux64.json
+++ b/build/build-clang/clang-static-analysis-linux64.json
@@ -14,15 +14,7 @@
     "cc": "/home/worker/workspace/build/src/gcc/bin/gcc",
     "cxx": "/home/worker/workspace/build/src/gcc/bin/g++",
     "as": "/home/worker/workspace/build/src/gcc/bin/gcc",
-    "patches": {
-        "macosx64": [
-          "llvm-debug-frame.patch"
-        ],
-        "linux64": [
-          "llvm-debug-frame.patch"
-        ],
-        "linux32": [
-          "llvm-debug-frame.patch"
-        ]
-    }
+    "patches": [
+      "llvm-debug-frame.patch"
+    ]
 }
diff --git a/build/build-clang/clang-static-analysis-macosx64.json b/build/build-clang/clang-static-analysis-macosx64.json
index ecfa836bf7bb..7c5cbed21a7f 100644
--- a/build/build-clang/clang-static-analysis-macosx64.json
+++ b/build/build-clang/clang-static-analysis-macosx64.json
@@ -19,27 +19,11 @@
     "ranlib": "/home/worker/workspace/build/src/cctools/bin/x86_64-apple-darwin11-ranlib",
     "libtool": "/home/worker/workspace/build/src/cctools/bin/x86_64-apple-darwin11-libtool",
     "ld": "/home/worker/workspace/build/src/clang/bin/clang",
-    "patches": {
-        "macosx64": [
-          "llvm-debug-frame.patch",
-          "compiler-rt-cross-compile.patch",
-          "pr28831-r280042.patch",
-          "r277806.patch",
-          "r285657.patch"
-        ],
-        "linux64": [
-          "llvm-debug-frame.patch",
-          "compiler-rt-cross-compile.patch",
-          "pr28831-r280042.patch",
-          "r277806.patch",
-          "r285657.patch"
-        ],
-        "linux32": [
-          "llvm-debug-frame.patch",
-          "compiler-rt-cross-compile.patch",
-          "pr28831-r280042.patch",
-          "r277806.patch",
-          "r285657.patch"
-        ]
-    }
+    "patches":[
+      "llvm-debug-frame.patch",
+      "compiler-rt-cross-compile.patch",
+      "pr28831-r280042.patch",
+      "r277806.patch",
+      "r285657.patch"
+    ]
 }
diff --git a/build/build-clang/clang-static-analysis-win32.json b/build/build-clang/clang-static-analysis-win32.json
index b21987a4ee03..f09973cf6994 100644
--- a/build/build-clang/clang-static-analysis-win32.json
+++ b/build/build-clang/clang-static-analysis-win32.json
@@ -10,7 +10,5 @@
     "libcxx_repo": "https://llvm.org/svn/llvm-project/libcxx/trunk",
     "python_path": "c:/mozilla-build/python/python.exe",
     "cc": "cl.exe",
-    "cxx": "cl.exe",
-    "patches": {
-    }
+    "cxx": "cl.exe"
 }
diff --git a/build/build-clang/clang-static-analysis-win64.json b/build/build-clang/clang-static-analysis-win64.json
index f23b95dadc1c..a4b8d62b48b0 100644
--- a/build/build-clang/clang-static-analysis-win64.json
+++ b/build/build-clang/clang-static-analysis-win64.json
@@ -11,7 +11,5 @@
     "python_path": "c:/mozilla-build/python/python.exe",
     "cc": "cl.exe",
     "cxx": "cl.exe",
-    "ml": "ml64.exe",
-    "patches": {
-    }
+    "ml": "ml64.exe"
 }
diff --git a/build/build-clang/clang-tidy-macosx64.json b/build/build-clang/clang-tidy-macosx64.json
index 8f19bddbed7a..aaba8800eb4c 100644
--- a/build/build-clang/clang-tidy-macosx64.json
+++ b/build/build-clang/clang-tidy-macosx64.json
@@ -20,18 +20,8 @@
     "ar": "/home/worker/workspace/build/src/cctools/bin/x86_64-apple-darwin11-ar",
     "ranlib": "/home/worker/workspace/build/src/cctools/bin/x86_64-apple-darwin11-ranlib",
     "ld": "/home/worker/workspace/build/src/clang/bin/clang",
-    "patches": {
-        "macosx64": [
-          "llvm-debug-frame.patch",
-          "compiler-rt-cross-compile.patch"
-        ],
-        "linux64": [
-          "llvm-debug-frame.patch",
-          "compiler-rt-cross-compile.patch"
-        ],
-        "linux32": [
-          "llvm-debug-frame.patch",
-          "compiler-rt-cross-compile.patch"
-        ]
-    }
+    "patches": [
+      "llvm-debug-frame.patch",
+      "compiler-rt-cross-compile.patch"
+    ]
 }