diff --git a/scripts/runqemu b/scripts/runqemu
index b9dbe97cba..fca8d1d29d 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -806,6 +806,9 @@ class BaseConfig(object):
 
         self.qemu_opt = "%s %s %s %s %s %s" % (qemu_bin, self.get('NETWORK_CMD'), self.qemu_opt_script, self.get('ROOTFS_OPTIONS'), self.get('QB_DTB'), self.get('QB_OPT_APPEND'))
 
+        # Enable virtio RNG else we can run out of entropy in guests
+        self.qemu_opt += " -device virtio-rng-pci"
+
         if self.serialstdio:
             logger.info("Interrupt character is '^]'")
             cmd = "stty intr ^]"