diff --git a/ext/smoothstreaming/gstmssdemux.c b/ext/smoothstreaming/gstmssdemux.c
index 85f0ec8..55304ed 100644
--- a/ext/smoothstreaming/gstmssdemux.c
+++ b/ext/smoothstreaming/gstmssdemux.c
@@ -385,6 +385,7 @@ _create_pad (GstMssDemux * mssdemux, GstMssStream * manifeststream)
   return srcpad;
 }
 
+#define PLAYREADY_SYSTEM_ID "9A04F079-9840-4286-AB92-E65BE0885F95"
 static void
 gst_mss_demux_apply_protection_system (GstCaps * caps,
     const gchar * selected_system)
@@ -392,13 +393,16 @@ gst_mss_demux_apply_protection_system (GstCaps * caps,
   GstStructure *s;
 
   g_return_if_fail (selected_system);
-  s = gst_caps_get_structure (caps, 0);
-  gst_structure_set (s,
-      "original-media-type", G_TYPE_STRING, gst_structure_get_name (s),
-      GST_PROTECTION_SYSTEM_ID_CAPS_FIELD, G_TYPE_STRING, selected_system,
-      NULL);
-  gst_structure_set_name (s, "application/x-cenc");
 
+  /* if playready is encrypted, application/x-cenc is not set */
+  if (g_ascii_strcasecmp (selected_system, PLAYREADY_SYSTEM_ID) != 0) {
+    s = gst_caps_get_structure (caps, 0);
+    gst_structure_set (s,
+        "original-media-type", G_TYPE_STRING, gst_structure_get_name (s),
+        GST_PROTECTION_SYSTEM_ID_CAPS_FIELD, G_TYPE_STRING, selected_system,
+        NULL);
+    gst_structure_set_name (s, "application/x-cenc");
+  }
 }
 
 static gboolean