diff --git a/clang/lib/Basic/Targets/AArch64.cpp b/clang/lib/Basic/Targets/AArch64.cpp
index 3840139d27434..d661f25ea00f2 100644
--- a/clang/lib/Basic/Targets/AArch64.cpp
+++ b/clang/lib/Basic/Targets/AArch64.cpp
@@ -340,12 +340,6 @@ void AArch64TargetInfo::getTargetDefines(const LangOptions &Opts,
       getTriple().isOSBinFormatELF())
     Builder.defineMacro("__ELF__");
 
-  // Target properties.
-  if (!getTriple().isOSWindows() && getTriple().isArch64Bit()) {
-    Builder.defineMacro("_LP64");
-    Builder.defineMacro("__LP64__");
-  }
-
   std::string CodeModel = getTargetOpts().CodeModel;
   if (CodeModel == "default")
     CodeModel = "small";