diff -r dd9708ed6940 -r 7efa6f630cd8 src/mem/cache/cache.cc
--- a/src/mem/cache/cache.cc	Mon Oct 19 15:18:48 2015 +0100
+++ b/src/mem/cache/cache.cc	Mon Oct 19 15:20:40 2015 +0100
@@ -676,7 +676,7 @@
             // lat, neglecting responseLatency, modelling hit latency
             // just as lookupLatency or or the value of lat overriden
             // by access(), that calls accessBlock() function.
-            cpuSidePort->schedTimingResp(pkt, request_time);
+            cpuSidePort->schedTimingResp(pkt, request_time, true);
         } else {
             /// @todo nominally we should just delete the packet here,
             /// however, until 4-phase stuff we can't because sending cache is
@@ -734,7 +734,7 @@
             std::memset(pkt->getPtr<uint8_t>(), 0xFF, pkt->getSize());
             // request_time is used here, taking into account lat and the delay
             // charged if the packet comes from the xbar.
-            cpuSidePort->schedTimingResp(pkt, request_time);
+            cpuSidePort->schedTimingResp(pkt, request_time, true);
 
             // If an outstanding request is in progress (we found an
             // MSHR) this is set to null
@@ -1341,7 +1341,7 @@
             }
             // Reset the bus additional time as it is now accounted for
             tgt_pkt->headerDelay = tgt_pkt->payloadDelay = 0;
-            cpuSidePort->schedTimingResp(tgt_pkt, completion_time);
+            cpuSidePort->schedTimingResp(tgt_pkt, completion_time, true);
             break;
 
           case MSHR::Target::FromPrefetcher:
diff -r dd9708ed6940 -r 7efa6f630cd8 src/mem/qport.hh
--- a/src/mem/qport.hh	Mon Oct 19 15:18:48 2015 +0100
+++ b/src/mem/qport.hh	Mon Oct 19 15:20:40 2015 +0100
@@ -88,8 +88,8 @@
      * @param pkt Packet to send
      * @param when Absolute time (in ticks) to send packet
      */
-    void schedTimingResp(PacketPtr pkt, Tick when)
-    { respQueue.schedSendTiming(pkt, when); }
+    void schedTimingResp(PacketPtr pkt, Tick when, bool force_order = false)
+    { respQueue.schedSendTiming(pkt, when, force_order); }
 
     /** Check the list of buffered packets against the supplied
      * functional request. */