diff --git a/Kernel/FileSystem/InodeWatcher.cpp b/Kernel/FileSystem/InodeWatcher.cpp
index 61dd040a89..e85dff86fd 100644
--- a/Kernel/FileSystem/InodeWatcher.cpp
+++ b/Kernel/FileSystem/InodeWatcher.cpp
@@ -123,8 +123,12 @@ ErrorOr<int> InodeWatcher::register_inode(Inode& inode, unsigned event_mask)
 
     auto description = TRY(WatchDescription::create(wd, inode, event_mask));
 
-    m_inode_to_watches.set(inode.identifier(), description.ptr());
-    m_wd_to_watches.set(wd, move(description));
+    TRY(m_inode_to_watches.try_set(inode.identifier(), description.ptr()));
+    auto result = m_wd_to_watches.try_set(wd, move(description));
+    if (result.is_error()) {
+        m_inode_to_watches.remove(inode.identifier());
+        return result.release_error();
+    }
 
     inode.register_watcher({}, *this);
     return wd;