diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 155bb17f87d..0feb87fd339 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -1642,7 +1642,7 @@ static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
   Out << "/* get a declaration for alloca */\n"
       << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
       << "#define  alloca(x) __builtin_alloca((x))\n"
-      << "#define _alloca(x) __builtin_alloca((x))\n"    
+      << "#define _alloca(x) __builtin_alloca((x))\n"
       << "#elif defined(__APPLE__)\n"
       << "extern void *__builtin_alloca(unsigned long);\n"
       << "#define alloca(x) __builtin_alloca(x)\n"
@@ -1655,7 +1655,7 @@ static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
       << "extern void *__builtin_alloca(unsigned int);\n"
       << "#endif\n"
       << "#define alloca(x) __builtin_alloca(x)\n"
-      << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)\n"
+      << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
       << "#define alloca(x) __builtin_alloca(x)\n"
       << "#elif defined(_MSC_VER)\n"
       << "#define inline _inline\n"