diff --git a/kernel/src/fs/ext2/FileSystem.cpp b/kernel/src/fs/ext2/FileSystem.cpp
index 31a80ec6..9735f3a9 100644
--- a/kernel/src/fs/ext2/FileSystem.cpp
+++ b/kernel/src/fs/ext2/FileSystem.cpp
@@ -27,7 +27,8 @@ namespace Ext2
 
     Result<SharedPtr<VFS::Inode>> FileSystem::find_inode_by_number(ino_t inum, bool initialize_dir_now)
     {
-        check(inum < m_superblock.nr_inodes);
+        // Inode numbers start at 1.
+        check(inum <= m_superblock.nr_inodes);
 
         auto maybe_inode = m_inode_cache.try_get(inum);
         if (maybe_inode.has_value()) return maybe_inode.value();