diff --git a/src/backend.h b/src/backend.h
index 60a40a4..f0b59ae 100644
--- a/src/backend.h
+++ b/src/backend.h
@@ -128,7 +128,7 @@ typedef int (bookmarkfs_bookmark_check_cb) (
 
 typedef int (bookmarkfs_bookmark_check_func) (
     void                               *backend_ctx,
-    uint64_t                            id,
+    uint64_t                            parent_id,
     struct bookmarkfs_fsck_data const  *fsck_data,
     uint32_t                            flags,
     bookmarkfs_bookmark_check_cb       *callback,
diff --git a/src/backend_chromium.c b/src/backend_chromium.c
index 8de4ce0..2fd0f9f 100644
--- a/src/backend_chromium.c
+++ b/src/backend_chromium.c
@@ -1857,7 +1857,7 @@ backend_sandbox (
 static int
 bookmark_check (
     void                               *backend_ctx,
-    uint64_t                            id,
+    uint64_t                            parent_id,
     struct bookmarkfs_fsck_data const  *fsck_data,
     uint32_t                            UNUSED_VAR(flags),
     bookmarkfs_bookmark_check_cb       *callback,
@@ -1883,7 +1883,8 @@ bookmark_check (
         }
     }
     // Unlike bookmark_list(), always fetch the latest entries during fsck.
-    struct node_entry const *entry = lookup_id(ctx->id_map, id, NULL, NULL);
+    struct node_entry const *entry
+        = lookup_id(ctx->id_map, parent_id, NULL, NULL);
     if (unlikely(entry == NULL || entry->name == NULL)) {
         return -ESTALE;
     }
@@ -1898,11 +1899,12 @@ bookmark_check (
         goto end;
     }
     if (fsck_data == NULL) {
-        status = fsck_next(ctx, id, children, &idx, callback, user_data);
+        status = fsck_next(ctx, parent_id, children, &idx, callback,
+                user_data);
     } else {
         debug_assert(!(ctx->flags & BOOKMARKFS_BACKEND_READONLY));
 #ifdef BOOKMARKFS_BACKEND_CHROMIUM_WRITE
-        status = fsck_apply(ctx, id, fsck_data, callback, user_data);
+        status = fsck_apply(ctx, parent_id, fsck_data, callback, user_data);
 #endif
     }
 
diff --git a/src/backend_firefox.c b/src/backend_firefox.c
index e0ccc5d..f111501 100644
--- a/src/backend_firefox.c
+++ b/src/backend_firefox.c
@@ -2999,7 +2999,7 @@ backend_sandbox (
 static int
 bookmark_check (
     void                               *backend_ctx,
-    uint64_t                            id,
+    uint64_t                            parent_id,
     struct bookmarkfs_fsck_data const  *fsck_data,
     uint32_t                            flags,
     bookmarkfs_bookmark_check_cb       *callback,
@@ -3013,7 +3013,7 @@ bookmark_check (
     }
     switch (flags & BOOKMARKFS_BOOKMARK_TYPE_MASK) {
       case BOOKMARKFS_BOOKMARK_TYPE(TAG):
-        if (id == ctx->tags_root_id) {
+        if (parent_id == ctx->tags_root_id) {
             break;
         }
         // fallthrough
@@ -3050,11 +3050,11 @@ bookmark_check (
     qctx.user_data      = user_data;
     if (fsck_data == NULL) {
         qctx.status = 0;
-        status = bookmark_do_list(ctx, id, idx, flags, &qctx);
+        status = bookmark_do_list(ctx, parent_id, idx, flags, &qctx);
     } else {
         debug_assert(!(ctx->flags & BOOKMARKFS_BACKEND_READONLY));
 #ifdef BOOKMARKFS_BACKEND_FIREFOX_WRITE
-        status = fsck_apply(ctx, id, fsck_data, &qctx);
+        status = fsck_apply(ctx, parent_id, fsck_data, &qctx);
 #endif
     }
     dentry_map = qctx.dentry_map;