Index: libs/filesystem/v2/src/v2_operations.cpp
===================================================================
--- libs/filesystem/v2/src/v2_operations.cpp	(revision 75283)
+++ libs/filesystem/v2/src/v2_operations.cpp	(working copy)
@@ -58,14 +58,11 @@
 
 # else // BOOST_POSIX_API
 #   include <sys/types.h>
-#   if !defined(__APPLE__) && !defined(__OpenBSD__)
+#   ifndef __APPLE__
 #     include <sys/statvfs.h>
 #     define BOOST_STATVFS statvfs
 #     define BOOST_STATVFS_F_FRSIZE vfs.f_frsize
 #   else
-#ifdef __OpenBSD__
-#     include <sys/param.h>
-#endif
 #     include <sys/mount.h>
 #     define BOOST_STATVFS statfs
 #     define BOOST_STATVFS_F_FRSIZE static_cast<boost::uintmax_t>( vfs.f_bsize )
Index: libs/filesystem/v3/src/operations.cpp
===================================================================
--- libs/filesystem/v3/src/operations.cpp	(revision 75283)
+++ libs/filesystem/v3/src/operations.cpp	(working copy)
@@ -81,14 +81,11 @@
     const fs::path dot_path(".");
     const fs::path dot_dot_path("..");
 #   include <sys/types.h>
-#   if !defined(__APPLE__) && !defined(__OpenBSD__)
+#   ifndef __APPLE__
 #     include <sys/statvfs.h>
 #     define BOOST_STATVFS statvfs
 #     define BOOST_STATVFS_F_FRSIZE vfs.f_frsize
 #   else
-#     ifdef __OpenBSD__
-#     include <sys/param.h>
-#     endif
 #     include <sys/mount.h>
 #     define BOOST_STATVFS statfs
 #     define BOOST_STATVFS_F_FRSIZE static_cast<boost::uintmax_t>(vfs.f_bsize)