diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index 998029dcbb..476bcbe918 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -634,11 +634,6 @@ libxlMakeDomBuildInfo(virDomainDefPtr def,
             return -1;
         }
 #endif
-
-        /* Allow libxl to calculate shadow memory requirements */
-        b_info->shadow_memkb =
-            libxl_get_required_shadow_memory(b_info->max_memkb,
-                                             b_info->max_vcpus);
     } else {
         /*
          * For compatibility with the legacy xen toolstack, default to pygrub
@@ -692,6 +687,11 @@ libxlMakeDomBuildInfo(virDomainDefPtr def,
         }
     }
 
+    /* Allow libxl to calculate shadow memory requirements */
+    b_info->shadow_memkb =
+        libxl_get_required_shadow_memory(b_info->max_memkb,
+                                         b_info->max_vcpus);
+
     return 0;
 }
 
diff --git a/tests/libxlxml2domconfigdata/basic-pv.json b/tests/libxlxml2domconfigdata/basic-pv.json
index 0f846daabd..b71c3b0f49 100644
--- a/tests/libxlxml2domconfigdata/basic-pv.json
+++ b/tests/libxlxml2domconfigdata/basic-pv.json
@@ -14,6 +14,7 @@
         ],
         "max_memkb": 524288,
         "target_memkb": 524288,
+        "shadow_memkb": 8192,
         "sched_params": {
 
         },
diff --git a/tests/libxlxml2domconfigdata/multiple-ip.json b/tests/libxlxml2domconfigdata/multiple-ip.json
index 80dca82611..2db98b82f6 100644
--- a/tests/libxlxml2domconfigdata/multiple-ip.json
+++ b/tests/libxlxml2domconfigdata/multiple-ip.json
@@ -14,6 +14,7 @@
         ],
         "max_memkb": 524288,
         "target_memkb": 524288,
+        "shadow_memkb": 8192,
         "sched_params": {
 
         },