diff --git a/sources/custom/Object.cs b/sources/custom/Object.cs
index bd35dff962..be3c70c9f2 100644
--- a/sources/custom/Object.cs
+++ b/sources/custom/Object.cs
@@ -14,6 +14,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 using System;
+using System.Collections.Generic;
 using System.Runtime.InteropServices;
 
 namespace Gst {
@@ -22,14 +23,25 @@ namespace Gst {
 	
 	partial class Object 
 	{
+		private Dictionary <string, bool> PropertyNameCache = new Dictionary<string, bool> ();
+
 		[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
 		static extern IntPtr g_object_class_find_property (IntPtr klass, IntPtr name);
 
+
 		bool PropertyExists (string name) {
+			if (PropertyNameCache.ContainsKey (name))
+				return PropertyNameCache [name];
+
 			var ptr = g_object_class_find_property (GType.GetClassPtr (), GLib.Marshaller.StringToPtrGStrdup (name));
 			var result = ptr != IntPtr.Zero;
 			GLib.Marshaller.Free (ptr);
 
+			// just cache the positive results because there might
+			// actually be new properties getting installed
+			if (result)
+				PropertyNameCache [name] = result;
+
 			return result;
 		}