Index: os-dep.h
===================================================================
--- os-dep.h	(Revision 10184)
+++ os-dep.h	(Revision 10185)
@@ -85,12 +85,14 @@
 
 #elif defined(_WIN32) || defined(_MSC_VER) || defined(__MINGW32__)
 
+ #define MADV_SEQUENTIAL 0
  #define HAVE_SENDFILE 0
  #define HAVE_MMAP 0
  double sendfile_implementation(int src,int dst,double offset,int to_send);
 
 #else
 
+ #define MADV_SEQUENTIAL 0
  #define HAVE_SENDFILE 0
  #define HAVE_MMAP 0
  double sendfile_implementation(int src,int dst,double offset,size_t to_send);