diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index 983e74a3cf5d831c22fffd310559b054e7b5e58e..9f2d652adca71c8d9089c3d54c73eec5ec28176d 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -49,14 +49,6 @@
 # include "virfilecache.h"
 # include "virfirmware.h"
 
-# ifdef CPU_SETSIZE /* Linux */
-#  define QEMUD_CPUMASK_LEN CPU_SETSIZE
-# elif defined(_SC_NPROCESSORS_CONF) /* Cygwin */
-#  define QEMUD_CPUMASK_LEN (sysconf(_SC_NPROCESSORS_CONF))
-# else
-#  error "Port me"
-# endif
-
 # define QEMU_DRIVER_NAME "QEMU"
 
 typedef struct _virQEMUDriver virQEMUDriver;