diff --git a/cista-front/src/repositories/Document.ts b/cista-front/src/repositories/Document.ts
index a57e93b..9bf177a 100644
--- a/cista-front/src/repositories/Document.ts
+++ b/cista-front/src/repositories/Document.ts
@@ -30,13 +30,13 @@ export type errorEvent = {
 // Raw types the backend /api/watch sends us
 
 export type FileEntry = {
-  id: FUID
+  key: FUID
   size: number
   mtime: number
 }
 
 export type DirEntry = {
-  id: FUID
+  key: FUID
   size: number
   mtime: number
   dir: DirList
@@ -47,7 +47,7 @@ export type DirList = Record<string, FileEntry | DirEntry>
 export type UpdateEntry = {
   name: string
   deleted?: boolean
-  id?: FUID
+  key?: FUID
   size?: number
   mtime?: number
   dir?: DirList
@@ -127,7 +127,7 @@ export class DocumentHandler {
         // @ts-ignore
         node = node.dir[elem.name] ||= {}
       }
-      if (elem.id !== undefined) node.id = elem.id
+      if (elem.key !== undefined) node.key = elem.key
       if (elem.size !== undefined) node.size = elem.size
       if (elem.mtime !== undefined) node.mtime = elem.mtime
       if (elem.dir !== undefined) node.dir = elem.dir
diff --git a/cista-front/src/stores/documents.ts b/cista-front/src/stores/documents.ts
index ffb422a..2c65231 100644
--- a/cista-front/src/stores/documents.ts
+++ b/cista-front/src/stores/documents.ts
@@ -60,10 +60,10 @@ export const useDocumentStore = defineStore({
       // Transform data
       const dataMapped = []
       for (const [name, attr] of Object.entries(matched)) {
-        const { id, size, mtime } = attr
+        const { key, size, mtime } = attr
         const element: Document = {
           name,
-          key: id,
+          key,
           size,
           sizedisp: formatSize(size),
           mtime,
@@ -182,21 +182,22 @@ export const useDocumentStore = defineStore({
         if (!('dir' in data)) return
         for (const [name, attr] of Object.entries(data.dir)) {
           const fullname = path ? `${path}/${name}` : name
+          const key = attr.key
           // Is this the file we are looking for? Ignore if nested within another selection.
           let r = relpath
-          if (selected.has(attr.id) && !relpath) {
-            ret.selected.add(attr.id)
+          if (selected.has(key) && !relpath) {
+            ret.selected.add(key)
             ret.rootdir[name] = attr
             r = name
           } else if (relpath) {
             r = `${relpath}/${name}`
           }
           if (r) {
-            ret.entries[attr.id] = attr
-            ret.fullpath[attr.id] = fullname
-            ret.relpath[attr.id] = r
-            ret.ids.push(attr.id)
-            if (!('dir' in attr)) ret.url[attr.id] = `/files/${fullname}`
+            ret.entries[key] = attr
+            ret.fullpath[key] = fullname
+            ret.relpath[key] = r
+            ret.ids.push(key)
+            if (!('dir' in attr)) ret.url[key] = `/files/${fullname}`
           }
           traverseDir(attr, fullname, r)
         }
diff --git a/cista/protocol.py b/cista/protocol.py
index 8008ac7..2bdf775 100644
--- a/cista/protocol.py
+++ b/cista/protocol.py
@@ -110,13 +110,13 @@ class ErrorMsg(msgspec.Struct):
 
 
 class FileEntry(msgspec.Struct):
-    id: str
+    key: str
     size: int
     mtime: int
 
 
 class DirEntry(msgspec.Struct):
-    id: str
+    key: str
     size: int
     mtime: int
     dir: DirList
@@ -146,7 +146,7 @@ class UpdateEntry(msgspec.Struct, omit_defaults=True):
 
     name: str = ""
     deleted: bool = False
-    id: str | None = None
+    key: str | None = None
     size: int | None = None
     mtime: int | None = None
     dir: DirList | None = None
diff --git a/cista/watching.py b/cista/watching.py
index 5249d40..4005eaf 100644
--- a/cista/watching.py
+++ b/cista/watching.py
@@ -90,7 +90,9 @@ def format_tree():
     return msgspec.json.encode(
         {
             "update": [
-                UpdateEntry(id=root.id, size=root.size, mtime=root.mtime, dir=root.dir),
+                UpdateEntry(
+                    key=root.key, size=root.size, mtime=root.mtime, dir=root.dir
+                ),
             ],
         },
     ).decode()
@@ -99,10 +101,11 @@ def format_tree():
 def walk(path: Path) -> DirEntry | FileEntry | None:
     try:
         s = path.stat()
-        id_ = fuid(s)
+        key = fuid(s)
+        assert key, repr(key)
         mtime = int(s.st_mtime)
         if path.is_file():
-            return FileEntry(id_, s.st_size, mtime)
+            return FileEntry(key, s.st_size, mtime)
 
         tree = {
             p.name: v
@@ -115,7 +118,7 @@ def walk(path: Path) -> DirEntry | FileEntry | None:
             mtime = max(mtime, *(v.mtime for v in tree.values()))
         else:
             size = 0
-        return DirEntry(id_, size, mtime, tree)
+        return DirEntry(key, size, mtime, tree)
     except FileNotFoundError:
         return None
     except OSError as e: