diff --git a/src/corehost/cli/coreclr.cpp b/src/corehost/cli/coreclr.cpp
index 780b7ca4e..c8aafc2fe 100644
--- a/src/corehost/cli/coreclr.cpp
+++ b/src/corehost/cli/coreclr.cpp
@@ -9,7 +9,7 @@
 static pal::dll_t g_coreclr = nullptr;
 
 // Prototype of the coreclr_initialize function from coreclr.dll
-typedef pal::hresult_t(__stdcall *coreclr_initialize_fn)(
+typedef pal::hresult_t(STDMETHODCALLTYPE *coreclr_initialize_fn)(
     const char* exePath,
     const char* appDomainFriendlyName,
     int propertyCount,
@@ -19,12 +19,12 @@ typedef pal::hresult_t(__stdcall *coreclr_initialize_fn)(
     unsigned int* domainId);
 
 // Prototype of the coreclr_shutdown function from coreclr.dll
-typedef pal::hresult_t(__stdcall *coreclr_shutdown_fn)(
+typedef pal::hresult_t(STDMETHODCALLTYPE *coreclr_shutdown_fn)(
     coreclr::host_handle_t hostHandle,
     unsigned int domainId);
 
 // Prototype of the coreclr_execute_assembly function from coreclr.dll
-typedef pal::hresult_t(__stdcall *coreclr_execute_assembly_fn)(
+typedef pal::hresult_t(STDMETHODCALLTYPE *coreclr_execute_assembly_fn)(
     coreclr::host_handle_t hostHandle,
     unsigned int domainId,
     int argc,
diff --git a/src/corehost/common/pal.h b/src/corehost/common/pal.h
index 826f26426..dd4deab7a 100644
--- a/src/corehost/common/pal.h
+++ b/src/corehost/common/pal.h
@@ -77,6 +77,8 @@ namespace pal
         #define SHARED_API
     #endif
 
+    #define STDMETHODCALLTYPE __stdcall
+
     typedef wchar_t char_t;
     typedef std::wstring string_t;
     typedef std::wstringstream stringstream_t;
@@ -107,6 +109,11 @@ namespace pal
         #define SHARED_API
     #endif
 
+    #define __cdecl    /* nothing */
+    #define __stdcall  /* nothing */
+    #define __fastcall /* nothing */
+    #define STDMETHODCALLTYPE __stdcall
+
     typedef char char_t;
     typedef std::string string_t;
     typedef std::stringstream stringstream_t;