diff --git a/src/coreclr/src/jit/gentree.h b/src/coreclr/src/jit/gentree.h
index 4c587b8e67631..ad0e2775be004 100644
--- a/src/coreclr/src/jit/gentree.h
+++ b/src/coreclr/src/jit/gentree.h
@@ -4091,7 +4091,7 @@ struct GenTreeCall final : public GenTree
     // tailcall mechanism.
     bool IsTailCallViaJitHelper() const
     {
-#ifdef _TARGET_X86_
+#ifdef TARGET_X86
         return IsTailCall() && (gtCallMoreFlags & GTF_CALL_M_TAILCALL_VIA_JIT_HELPER);
 #else
         return false;
@@ -4101,7 +4101,7 @@ struct GenTreeCall final : public GenTree
 #if FEATURE_FASTTAILCALL
     bool IsFastTailCall() const
     {
-#ifdef _TARGET_X86_
+#ifdef TARGET_X86
         return IsTailCall() && !(gtCallMoreFlags & GTF_CALL_M_TAILCALL_VIA_JIT_HELPER);
 #else
         return IsTailCall();
diff --git a/src/coreclr/src/jit/lclvars.cpp b/src/coreclr/src/jit/lclvars.cpp
index c6ab056bfb948..f93062dff004c 100644
--- a/src/coreclr/src/jit/lclvars.cpp
+++ b/src/coreclr/src/jit/lclvars.cpp
@@ -4901,7 +4901,7 @@ void Compiler::lvaFixVirtualFrameOffsets()
 
 #endif // FEATURE_FIXED_OUT_ARGS
 
-#ifdef _TARGET_ARM64_
+#ifdef TARGET_ARM64
     // We normally add alignment below the locals between them and the outgoing
     // arg space area. When we store fp/lr at the bottom, however, this will be
     // below the alignment. So we should not apply the alignment adjustment to
diff --git a/src/coreclr/src/jit/morph.cpp b/src/coreclr/src/jit/morph.cpp
index 562d6d2c9c8ec..8e7d08cd209cf 100644
--- a/src/coreclr/src/jit/morph.cpp
+++ b/src/coreclr/src/jit/morph.cpp
@@ -6766,7 +6766,7 @@ bool Compiler::fgCanFastTailCall(GenTreeCall* callee, const char** failReason)
         return false;
     }
 
-#ifdef _TARGET_AMD64_
+#ifdef TARGET_AMD64
     // Needed for Jit64 compat.
     // In future, enabling fast tail calls from methods that need GS cookie
     // check would require codegen side work to emit GS cookie check before a
@@ -17945,7 +17945,7 @@ bool Compiler::fgCheckStmtAfterTailCall()
 //
 bool Compiler::fgCanTailCallViaJitHelper()
 {
-#ifndef _TARGET_X86_
+#ifndef TARGET_X86
     // On anything except X86 we have no faster mechanism available.
     return false;
 #else