ntdll: Add implementation of tape IOCTLs.
diff --git a/configure.ac b/configure.ac
index 761f528..310b2e3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -248,6 +248,7 @@
 	sys/mman.h \
 	sys/modem.h \
 	sys/msg.h \
+	sys/mtio.h \
 	sys/param.h \
 	sys/poll.h \
 	sys/ptrace.h \