diff --git a/newlib/configure.host b/newlib/configure.host
index 6da8148cf..b3a355c2f 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -546,7 +546,7 @@ case "${host}" in
   mips*-psp-*)
   	sys_dir=psp
   	posix_dir=posix
-  	newlib_cflags="${newlib_cflags} -DHAVE_NANOSLEEP -DHAVE_RENAME -DHAVE_FCNTL -D_NO_POSIX_SPAWN -DHAVE_DD_LOCK"
+	newlib_cflags="${newlib_cflags} -DHAVE_NANOSLEEP -DHAVE_RENAME -DHAVE_FCNTL -DHAVE_BLKSIZE -D_NO_POSIX_SPAWN -DHAVE_DD_LOCK"
 	;;
   mmix-knuth-mmixware)
 	sys_dir=mmixware