diff --git a/dll/win32/msvcrt/except_i386.c b/dll/win32/msvcrt/except_i386.c
index 7d1faa95272..61e6e882dc1 100644
--- a/dll/win32/msvcrt/except_i386.c
+++ b/dll/win32/msvcrt/except_i386.c
@@ -729,6 +729,7 @@ int CDECL _except_handler4_common( ULONG *cookie, void (*check_cookie)(void),
 }
 
 
+#ifndef __REACTOS__
 /*
  * setjmp/longjmp implementation
  */
@@ -837,6 +838,7 @@ void __cdecl longjmp(_JUMP_BUFFER *jmp, int retval)
 
     __wine_longjmp( (__wine_jmp_buf *)jmp, retval );
 }
+#endif // __REACTOS__
 
 /*********************************************************************
  *		_seh_longjmp_unwind (MSVCRT.@)
diff --git a/dll/win32/msvcrt/except_x86_64.c b/dll/win32/msvcrt/except_x86_64.c
index e0fda975be4..caf6861d598 100644
--- a/dll/win32/msvcrt/except_x86_64.c
+++ b/dll/win32/msvcrt/except_x86_64.c
@@ -87,6 +87,7 @@ ULONG_PTR get_exception_pc( DISPATCHER_CONTEXT *dispatch )
 }
 
 
+#ifndef __REACTOS__
 /*******************************************************************
  *		longjmp (MSVCRT.@)
  */
@@ -109,6 +110,7 @@ void __cdecl longjmp( _JUMP_BUFFER *jmp, int retval )
     __wine_longjmp( (__wine_jmp_buf *)jmp, retval );
 }
 #endif
+#endif // __REACTOS__
 
 /*******************************************************************
  *		_local_unwind (MSVCRT.@)