diff --git a/dom0/qvm-core/qubes.py b/dom0/qvm-core/qubes.py
index 4888a1dd..55ed8717 100755
--- a/dom0/qvm-core/qubes.py
+++ b/dom0/qvm-core/qubes.py
@@ -473,6 +473,13 @@ class QubesVm(object):
         ret = host_metrics_record["memory_free"]
         return long(ret)
 
+    def get_total_xen_memory(self):
+        hosts = xend_session.session.xenapi.host.get_all()
+        host_record = xend_session.session.xenapi.host.get_record(hosts[0])
+        host_metrics_record = xend_session.session.xenapi.host_metrics.get_record(host_record["metrics"])
+        ret = host_metrics_record["memory_total"]
+        return long(ret)
+
     def start(self, debug_console = False, verbose = False):
         if dry_run:
             return
@@ -487,6 +494,10 @@ class QubesVm(object):
         if verbose:
             print "--> Loading the VM (type = {0})...".format(self.type)
 
+        if not self.is_netvm():          
+            total_mem_mb = self.get_total_xen_memory()/1024/1024 
+            xend_session.xend_server.xend.domain.maxmem_set(self.name, total_mem_mb)
+
         mem_required = self.get_mem_dynamic_max()
         qmemman_client = QMemmanClient()
         if not qmemman_client.request_memory(mem_required):