diff --git a/sdk/include/c++/stlport/stl/config/_reactos.h b/sdk/include/c++/stlport/stl/config/_reactos.h
index a29415d63b1..d1e7d1683e9 100644
--- a/sdk/include/c++/stlport/stl/config/_reactos.h
+++ b/sdk/include/c++/stlport/stl/config/_reactos.h
@@ -302,6 +302,8 @@
 // Calling convention
 #define _STLP_CALL __cdecl
 
+#if 0
+
 #ifdef _M_AMD64
 #ifdef __cplusplus
 extern "C" {
@@ -323,6 +325,8 @@ extern "C" {
 #define __cdecl__
 #endif /* _M_AMD64 */
 
+#endif
+
 // Include stlport windows specifics
 #include "_windows.h"