diff --git a/include/acpi/platform/acenv.h b/include/acpi/platform/acenv.h
index dab2ec5..c785485 100644
--- a/include/acpi/platform/acenv.h
+++ b/include/acpi/platform/acenv.h
@@ -136,7 +136,7 @@
 
 /*! [Begin] no source code translation */
 
-#if defined(__linux__)
+#if defined(_LINUX) || defined(__linux__)
 #include "aclinux.h"
 
 #elif defined(_AED_EFI)
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index a568717..6ed15a0 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -91,7 +91,10 @@
 #define ACPI_USE_NATIVE_DIVIDE
 #endif
 
+#ifndef __cdecl
 #define __cdecl
+#endif
+
 #define ACPI_FLUSH_CPU_CACHE()
 #endif				/* __KERNEL__ */