diff --git a/scripts/runqemu b/scripts/runqemu
index 9ddd47267c..2f77a7bd0f 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -814,7 +814,7 @@ class BaseConfig(object):
         self.set('QB_MEM', qb_mem)
 
         mach = self.get('MACHINE')
-        if not mach.startswith('qemumips'):
+        if not mach.startswith(('qemumips', 'qemux86')):
             self.kernel_cmdline_script += ' mem=%s' % self.get('QB_MEM').replace('-m','').strip() + 'M'
 
         self.qemu_opt_script += ' %s' % self.get('QB_MEM')