diff --git tools/qemu-xen-dir/Makefile.target tools/qemu-xen-dir/Makefile.target
index a111521..95d6bc0 100644
--- tools/qemu-xen-dir/Makefile.target
+++ tools/qemu-xen-dir/Makefile.target
@@ -33,6 +33,8 @@ endif
 PROGS=$(QEMU_PROG)
 STPFILES=

+LIBS+=-lrt -lm
+
 ifndef CONFIG_HAIKU
 LIBS+=-lm
 endif
--- tools/qemu-xen-traditional-dir-remote/configure.old
+++ tools/qemu-xen-traditional-dir-remote/configure
@@ -1109,7 +1109,7 @@

 if test "$rt" = "yes" ; then
   # Hack, we should have a general purpose LIBS for this sort of thing
-  AIOLIBS="$AIOLIBS -lrt"
+  AIOLIBS="$AIOLIBS -lrt -lm"
 fi

 if test "$mingw32" = "yes" ; then
--- tools/qemu-xen-dir-remote/configure.orig
+++ tools/qemu-xen-dir-remote/configure
@@ -2469,7 +2469,7 @@
 if compile_prog "" "" ; then
   :
 elif compile_prog "" "-lrt" ; then
-  LIBS="-lrt $LIBS"
+  LIBS="-lrt -lm $LIBS"
 fi

 if test "$darwin" != "yes" -a "$mingw32" != "yes" -a "$solaris" != yes -a \
--- tools/qemu-xen-traditional-dir-remote/Makefile.target.orig
+++ tools/qemu-xen-traditional-dir-remote/Makefile.target
@@ -520,7 +520,7 @@
 OBJS+=block-raw-posix.o
 endif

-LIBS+=-lz
+LIBS+=-lz -lrt -lm
 ifdef CONFIG_ALSA
 LIBS += -lasound
 endif