diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index a98e27a1043c97e16e3efd83139c8f8332655506..f9e3a1b8b69da17871ae6fd2ad26ed140b9fd4d0 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -959,7 +959,7 @@ libxlMakeNicList(virDomainDefPtr def,  libxl_domain_config *d_config)
 }
 
 int
-libxlMakeVfb(libxlDriverPrivatePtr driver,
+libxlMakeVfb(virPortAllocatorPtr graphicsports,
              virDomainGraphicsDefPtr l_vfb,
              libxl_device_vfb *x_vfb)
 {
@@ -982,7 +982,7 @@ libxlMakeVfb(libxlDriverPrivatePtr driver,
             libxl_defbool_set(&x_vfb->vnc.findunused, 0);
             if (l_vfb->data.vnc.autoport) {
 
-                if (virPortAllocatorAcquire(driver->reservedVNCPorts, &port) < 0)
+                if (virPortAllocatorAcquire(graphicsports, &port) < 0)
                     return -1;
                 l_vfb->data.vnc.port = port;
             }
@@ -1004,7 +1004,7 @@ libxlMakeVfb(libxlDriverPrivatePtr driver,
 }
 
 static int
-libxlMakeVfbList(libxlDriverPrivatePtr driver,
+libxlMakeVfbList(virPortAllocatorPtr graphicsports,
                  virDomainDefPtr def,
                  libxl_domain_config *d_config)
 {
@@ -1027,7 +1027,7 @@ libxlMakeVfbList(libxlDriverPrivatePtr driver,
     for (i = 0; i < nvfbs; i++) {
         libxl_device_vkb_init(&x_vkbs[i]);
 
-        if (libxlMakeVfb(driver, l_vfbs[i], &x_vfbs[i]) < 0)
+        if (libxlMakeVfb(graphicsports, l_vfbs[i], &x_vfbs[i]) < 0)
             goto error;
     }
 
@@ -1305,7 +1305,7 @@ libxlMakeCapabilities(libxl_ctx *ctx)
 }
 
 int
-libxlBuildDomainConfig(libxlDriverPrivatePtr driver,
+libxlBuildDomainConfig(virPortAllocatorPtr graphicsports,
                        virDomainDefPtr def,
                        libxl_ctx *ctx,
                        libxl_domain_config *d_config)
@@ -1324,7 +1324,7 @@ libxlBuildDomainConfig(libxlDriverPrivatePtr driver,
     if (libxlMakeNicList(def, d_config) < 0)
         return -1;
 
-    if (libxlMakeVfbList(driver, def, d_config) < 0)
+    if (libxlMakeVfbList(graphicsports, def, d_config) < 0)
         return -1;
 
     if (libxlMakePCIList(def, d_config) < 0)
diff --git a/src/libxl/libxl_conf.h b/src/libxl/libxl_conf.h
index 1dd9de3bf26527dd9753c56485a9255b6c8f8a2a..2dcd0b800420a42b5b8ebde4eaf7b299216d2dec 100644
--- a/src/libxl/libxl_conf.h
+++ b/src/libxl/libxl_conf.h
@@ -152,14 +152,14 @@ libxlMakeNic(virDomainDefPtr def,
              virDomainNetDefPtr l_nic,
              libxl_device_nic *x_nic);
 int
-libxlMakeVfb(libxlDriverPrivatePtr driver,
+libxlMakeVfb(virPortAllocatorPtr graphicsports,
              virDomainGraphicsDefPtr l_vfb, libxl_device_vfb *x_vfb);
 
 int
 libxlMakePCI(virDomainHostdevDefPtr hostdev, libxl_device_pci *pcidev);
 
 int
-libxlBuildDomainConfig(libxlDriverPrivatePtr driver,
+libxlBuildDomainConfig(virPortAllocatorPtr graphicsports,
                        virDomainDefPtr def,
                        libxl_ctx *ctx,
                        libxl_domain_config *d_config);
diff --git a/src/libxl/libxl_domain.c b/src/libxl/libxl_domain.c
index ba0af31718df3dcfac9e2a3cf8874c4a3be24787..a1669801d9d8992816aeb3b9d7a7234738ecc02b 100644
--- a/src/libxl/libxl_domain.c
+++ b/src/libxl/libxl_domain.c
@@ -1151,7 +1151,7 @@ libxlDomainStart(libxlDriverPrivatePtr driver, virDomainObjPtr vm,
 
     libxl_domain_config_init(&d_config);
 
-    if (libxlBuildDomainConfig(driver, vm->def,
+    if (libxlBuildDomainConfig(driver->reservedVNCPorts, vm->def,
                                priv->ctx, &d_config) < 0)
         goto endjob;