diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 4e3a061..a6d4ef2 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -107,13 +107,13 @@ static const int *vhost_net_get_feature_bits(struct vhost_net *net)
     return feature_bits;
 }
 
-unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
+uint64_t vhost_net_get_features(struct vhost_net *net, uint64_t features)
 {
     return vhost_get_features(&net->dev, vhost_net_get_feature_bits(net),
             features);
 }
 
-void vhost_net_ack_features(struct vhost_net *net, unsigned features)
+void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
 {
     net->dev.acked_features = net->dev.backend_features;
     vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features);
@@ -147,7 +147,7 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
             goto fail;
         }
         net->dev.backend_features = qemu_has_vnet_hdr(options->net_backend)
-            ? 0 : (1 << VHOST_NET_F_VIRTIO_NET_HDR);
+            ? 0 : (1ULL << VHOST_NET_F_VIRTIO_NET_HDR);
         net->backend = r;
     } else {
         net->dev.backend_features = 0;
@@ -166,7 +166,7 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
     if (backend_kernel) {
         if (!qemu_has_vnet_hdr_len(options->net_backend,
                                sizeof(struct virtio_net_hdr_mrg_rxbuf))) {
-            net->dev.features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
+            net->dev.features &= ~(1ULL << VIRTIO_NET_F_MRG_RXBUF);
         }
         if (~net->dev.features & net->dev.backend_features) {
             fprintf(stderr, "vhost lacks feature mask %" PRIu64
@@ -423,11 +423,11 @@ void vhost_net_cleanup(struct vhost_net *net)
 {
 }
 
-unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
+uint64_t vhost_net_get_features(struct vhost_net *net, uint64_t features)
 {
     return features;
 }
-void vhost_net_ack_features(struct vhost_net *net, unsigned features)
+void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
 {
 }
 
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 5a12861..9e6e9cc 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -551,7 +551,7 @@ static int vhost_dev_set_features(struct vhost_dev *dev, bool enable_log)
     uint64_t features = dev->acked_features;
     int r;
     if (enable_log) {
-        features |= 0x1 << VHOST_F_LOG_ALL;
+        features |= 0x1ULL << VHOST_F_LOG_ALL;
     }
     r = dev->vhost_ops->vhost_call(dev, VHOST_SET_FEATURES, &features);
     return r < 0 ? -errno : 0;
@@ -860,7 +860,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
         .priority = 10
     };
     hdev->migration_blocker = NULL;
-    if (!(hdev->features & (0x1 << VHOST_F_LOG_ALL))) {
+    if (!(hdev->features & (0x1ULL << VHOST_F_LOG_ALL))) {
         error_setg(&hdev->migration_blocker,
                    "Migration disabled: vhost lacks VHOST_F_LOG_ALL feature.");
         migrate_add_blocker(hdev->migration_blocker);
@@ -1003,12 +1003,12 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
     assert(r >= 0);
 }
 
-unsigned vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
-        unsigned features)
+uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
+                            uint64_t features)
 {
     const int *bit = feature_bits;
     while (*bit != VHOST_INVALID_FEATURE_BIT) {
-        unsigned bit_mask = (1 << *bit);
+        uint64_t bit_mask = (1ULL << *bit);
         if (!(hdev->features & bit_mask)) {
             features &= ~bit_mask;
         }
@@ -1018,11 +1018,11 @@ unsigned vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
 }
 
 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
-        unsigned features)
+                        uint64_t features)
 {
     const int *bit = feature_bits;
     while (*bit != VHOST_INVALID_FEATURE_BIT) {
-        unsigned bit_mask = (1 << *bit);
+        uint64_t bit_mask = (1ULL << *bit);
         if (features & bit_mask) {
             hdev->acked_features |= bit_mask;
         }
diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
index d5593d1..71ef18f 100644
--- a/include/hw/virtio/vhost.h
+++ b/include/hw/virtio/vhost.h
@@ -72,8 +72,8 @@ bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n);
  */
 void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
                           bool mask);
-unsigned vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
-        unsigned features);
+uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
+                            uint64_t features);
 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
-        unsigned features);
+                        uint64_t features);
 #endif
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index b1c18a3..9eb493e 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -22,8 +22,8 @@ void vhost_net_stop(VirtIODevice *dev, NetClientState *ncs, int total_queues);
 
 void vhost_net_cleanup(VHostNetState *net);
 
-unsigned vhost_net_get_features(VHostNetState *net, unsigned features);
-void vhost_net_ack_features(VHostNetState *net, unsigned features);
+uint64_t vhost_net_get_features(VHostNetState *net, uint64_t features);
+void vhost_net_ack_features(VHostNetState *net, uint64_t features);
 
 bool vhost_net_virtqueue_pending(VHostNetState *net, int n);
 void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
