diff --git a/protocol/pantheon-desktop-shell.vapi b/protocol/pantheon-desktop-shell.vapi
index ec547e7..a383e8b 100644
--- a/protocol/pantheon-desktop-shell.vapi
+++ b/protocol/pantheon-desktop-shell.vapi
@@ -5,14 +5,13 @@
  */
 
 namespace PantheonDesktop {
-    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_shell_v1", cprefix = "io_elementary_pantheon_shell_v1_")]
+    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_shell_v1", cprefix = "io_elementary_pantheon_shell_v1_", free_function = "io_elementary_pantheon_shell_v1_destroy")]
     public class Shell : Wl.Proxy {
         [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "io_elementary_pantheon_shell_v1_interface")]
         public static Wl.Interface iface;
         public void set_user_data (void* user_data);
         public void* get_user_data ();
         public uint32 get_version ();
-        public void destroy ();
         public PantheonDesktop.Panel get_panel (Wl.Surface surface);
         public PantheonDesktop.Widget get_widget (Wl.Surface surface);
         public PantheonDesktop.ExtendedBehavior get_extended_behavior (Wl.Surface surface);
@@ -35,38 +34,35 @@ namespace PantheonDesktop {
         ALWAYS
     }
 
-    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_panel_v1", cprefix = "io_elementary_pantheon_panel_v1_")]
+    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_panel_v1", cprefix = "io_elementary_pantheon_panel_v1_", free_function = "io_elementary_pantheon_panel_v1_destroy")]
     public class Panel : Wl.Proxy {
         [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "io_elementary_pantheon_panel_v1_interface")]
         public static Wl.Interface iface;
         public void set_user_data (void* user_data);
         public void* get_user_data ();
         public uint32 get_version ();
-        public void destroy ();
         public void set_anchor (PantheonDesktop.Anchor anchor);
         public void focus ();
         public void set_size (int width, int height);
         public void set_hide_mode (PantheonDesktop.HideMode hide_mode);
     }
 
-    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_widget_v1", cprefix = "io_elementary_pantheon_widget_v1_")]
+    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_widget_v1", cprefix = "io_elementary_pantheon_widget_v1_", free_function = "io_elementary_pantheon_widget_v1_destroy")]
     public class Widget : Wl.Proxy {
         [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "io_elementary_pantheon_widget_v1_interface")]
         public static Wl.Interface iface;
         public void set_user_data (void* user_data);
         public void* get_user_data ();
         public uint32 get_version ();
-        public void destroy ();
     }
 
-    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_extended_behavior_v1", cprefix = "io_elementary_pantheon_extended_behavior_v1_")]
+    [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_extended_behavior_v1", cprefix = "io_elementary_pantheon_extended_behavior_v1_", free_function = "io_elementary_pantheon_extended_behavior_v1_destroy")]
     public class ExtendedBehavior : Wl.Proxy {
         [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "io_elementary_pantheon_extended_behavior_v1_interface")]
         public static Wl.Interface iface;
         public void set_user_data (void* user_data);
         public void* get_user_data ();
         public uint32 get_version ();
-        public void destroy ();
         public void set_keep_above ();
         public void make_centered ();
         public void focus ();