diff --git a/clang/lib/Basic/Targets/XCore.cpp b/clang/lib/Basic/Targets/XCore.cpp
index da614f10e338..ba64f15f3394 100644
--- a/clang/lib/Basic/Targets/XCore.cpp
+++ b/clang/lib/Basic/Targets/XCore.cpp
@@ -28,6 +28,7 @@ const Builtin::Info XCoreTargetInfo::BuiltinInfo[] = {
 
 void XCoreTargetInfo::getTargetDefines(const LangOptions &Opts,
                                        MacroBuilder &Builder) const {
+  Builder.defineMacro("__xcore__");
   Builder.defineMacro("__XS1B__");
 }
 
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 0329453c4136..be60eb6d9cf6 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -1468,6 +1468,7 @@
 // XCORE:#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
 // XCORE:#define __LITTLE_ENDIAN__ 1
 // XCORE:#define __XS1B__ 1
+// XCORE:#define __xcore__ 1
 //
 // RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=wasm32-unknown-unknown \
 // RUN:   < /dev/null \