diff --git a/include/reactos/wine/config.h b/include/reactos/wine/config.h
index cc682661373..2d62068fd05 100644
--- a/include/reactos/wine/config.h
+++ b/include/reactos/wine/config.h
@@ -1020,11 +1020,13 @@
 #define __ASM_CFI(str) str
 
 /* Define to a macro to define an assembly function */
+#ifndef _MSC_VER
 #ifndef NO_UNDERSCORE_PREFIX
 #define __ASM_DEFINE_FUNC(name,suffix,code) asm(".text\n\t.align 4\n\t.globl _" #name suffix "\n\t.def _" #name suffix "; .scl 2; .type 32; .endef\n_" #name suffix ":\n\t.cfi_startproc\n\t" code "\n\t.cfi_endproc");
 #else
 #define __ASM_DEFINE_FUNC(name,suffix,code) asm(".text\n\t.align 4\n\t.globl " #name suffix "\n\t.def " #name suffix "; .scl 2; .type 32; .endef\n" #name suffix ":\n\t.cfi_startproc\n\t" code "\n\t.cfi_endproc");
 #endif
+#endif
 
 /* Define to a macro to generate an assembly function directive */
 #define __ASM_FUNC(name) ".def " __ASM_NAME(name) "; .scl 2; .type 32; .endef"
@@ -1045,7 +1047,9 @@
 
 /* Define to a macro to generate an assembly function with stdcall calling
    convention */
+#ifndef _MSC_VER
 #define __ASM_STDCALL_FUNC(name,args,code) __ASM_DEFINE_FUNC(name,__ASM_STDCALL(args),code)
+#endif
 
 /* Define to empty if `const' does not conform to ANSI C. */
 /* #undef const */