diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
index 4a812d7a8b..ab977b995c 100644
--- a/src/util/virresctrl.c
+++ b/src/util/virresctrl.c
@@ -2143,6 +2143,42 @@ virResctrlAllocMemoryBandwidth(virResctrlInfoPtr resctrl,
 }
 
 
+static int
+virResctrlAllocCopyMemBW(virResctrlAllocPtr dst,
+                         virResctrlAllocPtr src)
+{
+    size_t i = 0;
+    virResctrlAllocMemBWPtr dst_bw = NULL;
+    virResctrlAllocMemBWPtr src_bw = src->mem_bw;
+
+    if (!src->mem_bw)
+        return 0;
+
+    if (!dst->mem_bw &&
+        VIR_ALLOC(dst->mem_bw) < 0)
+        return -1;
+
+    dst_bw = dst->mem_bw;
+
+    if (src_bw->nbandwidths > dst_bw->nbandwidths &&
+        VIR_EXPAND_N(dst_bw->bandwidths, dst_bw->nbandwidths,
+                     src_bw->nbandwidths - dst_bw->nbandwidths) < 0)
+        return -1;
+
+    for (i = 0; i < src_bw->nbandwidths; i++) {
+        if (dst_bw->bandwidths[i]) {
+            *dst_bw->bandwidths[i] = 123;
+            continue;
+        }
+        if (VIR_ALLOC(dst_bw->bandwidths[i]) < 0)
+            return -1;
+        *dst_bw->bandwidths[i] = *src_bw->bandwidths[i];
+    }
+
+    return 0;
+}
+
+
 static int
 virResctrlAllocCopyMasks(virResctrlAllocPtr dst,
                          virResctrlAllocPtr src)
@@ -2210,6 +2246,9 @@ virResctrlAllocAssign(virResctrlInfoPtr resctrl,
     if (virResctrlAllocCopyMasks(alloc, alloc_default) < 0)
         goto cleanup;
 
+    if (virResctrlAllocCopyMemBW(alloc, alloc_default) < 0)
+        goto cleanup;
+
     for (level = 0; level < alloc->nlevels; level++) {
         virResctrlAllocPerLevelPtr a_level = alloc->levels[level];
         virResctrlAllocPerLevelPtr f_level = NULL;