diff --git a/include/zinnia/mutex.h b/include/zinnia/mutex.h
index 1a48e90..ecece7f 100644
--- a/include/zinnia/mutex.h
+++ b/include/zinnia/mutex.h
@@ -1,11 +1,8 @@
 #pragma once
 
-struct task;
+#include <stdint.h>
 
-struct mutex {
-    struct task* owner;
-    bool flag;
-};
+typedef uintptr_t mutex_t;
 
-void mutex_lock(struct mutex* mutex);
-void mutex_unlock(struct mutex* mutex);
+void mutex_lock(mutex_t* mutex);
+void mutex_unlock(mutex_t* mutex);
diff --git a/include/zinnia/vfs.h b/include/zinnia/vfs.h
index 5e80ae9..8aa1b79 100644
--- a/include/zinnia/vfs.h
+++ b/include/zinnia/vfs.h
@@ -106,7 +106,7 @@ struct vfs_entry {
     // The name of this entry.
     char* name;
     size_t name_len;
-    struct mutex lock;
+    mutex_t lock;
 
     enum vfs_entry_state state;
     // The inode this entry points to when present.
@@ -250,7 +250,7 @@ struct vfs_node {
     const struct vfs_file_ops* file_ops;
     struct vfs_super_block* sb;
 
-    struct mutex lock;
+    mutex_t lock;
     void* priv;
 
     ino_t id;
@@ -305,7 +305,7 @@ struct vfs_file {
 
     enum vfs_file_position position_kind;
     off_t position;
-    struct mutex lock;
+    mutex_t lock;
 
     struct vfs_path path;
     bool has_path;