diff --git a/server/file.h b/server/file.h
index 0ffe0e2c8dc..210fcec5e78 100644
--- a/server/file.h
+++ b/server/file.h
@@ -102,7 +102,7 @@ extern obj_handle_t lock_fd( struct fd *fd, file_pos_t offset, file_pos_t count,
 extern void unlock_fd( struct fd *fd, file_pos_t offset, file_pos_t count );
 extern void allow_fd_caching( struct fd *fd );
 extern void set_fd_signaled( struct fd *fd, int signaled );
-extern char *dup_fd_name( struct fd *root, const char *name );
+extern char *dup_fd_name( struct fd *root, const char *name ) __WINE_DEALLOC(free) __WINE_MALLOC;
 extern void get_nt_name( struct fd *fd, struct unicode_str *name );
 
 extern int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry );
diff --git a/server/object.h b/server/object.h
index f156f1d2f13..dfdd691601f 100644
--- a/server/object.h
+++ b/server/object.h
@@ -139,12 +139,12 @@ struct wait_queue_entry
     struct thread_wait *wait;
 };
 
-extern void *mem_alloc( size_t size );  /* malloc wrapper */
-extern void *memdup( const void *data, size_t len );
+extern void *mem_alloc( size_t size ) __WINE_ALLOC_SIZE(1) __WINE_DEALLOC(free) __WINE_MALLOC;
+extern void *memdup( const void *data, size_t len ) __WINE_ALLOC_SIZE(2) __WINE_DEALLOC(free);
 extern void *alloc_object( const struct object_ops *ops );
 extern void namespace_add( struct namespace *namespace, struct object_name *ptr );
 extern const WCHAR *get_object_name( struct object *obj, data_size_t *len );
-extern WCHAR *default_get_full_name( struct object *obj, data_size_t *ret_len );
+extern WCHAR *default_get_full_name( struct object *obj, data_size_t *ret_len ) __WINE_DEALLOC(free) __WINE_MALLOC;
 extern void dump_object_name( struct object *obj );
 extern struct object *lookup_named_object( struct object *root, const struct unicode_str *name,
                                            unsigned int attr, struct unicode_str *name_left );
diff --git a/server/unicode.h b/server/unicode.h
index e031d6ef0cf..951100564cd 100644
--- a/server/unicode.h
+++ b/server/unicode.h
@@ -28,7 +28,7 @@
 
 extern int memicmp_strW( const WCHAR *str1, const WCHAR *str2, data_size_t len );
 extern unsigned int hash_strW( const WCHAR *str, data_size_t len, unsigned int hash_size );
-extern WCHAR *ascii_to_unicode_str( const char *str, struct unicode_str *ret );
+extern WCHAR *ascii_to_unicode_str( const char *str, struct unicode_str *ret ) __WINE_DEALLOC(free) __WINE_MALLOC;
 extern int parse_strW( WCHAR *buffer, data_size_t *len, const char *src, char endchar );
 extern int dump_strW( const WCHAR *str, data_size_t len, FILE *f, const char escape[2] );
 extern struct fd *load_intl_file(void);