diff --git a/src/screencast/pipewire_screencast.c b/src/screencast/pipewire_screencast.c
index b7f8162..000184b 100644
--- a/src/screencast/pipewire_screencast.c
+++ b/src/screencast/pipewire_screencast.c
@@ -153,7 +153,8 @@ static void pwr_handle_stream_param_changed(void *data, uint32_t id,
 		SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(1),
 		SPA_PARAM_BUFFERS_size,    SPA_POD_Int(cast->simple_frame.size),
 		SPA_PARAM_BUFFERS_stride,  SPA_POD_Int(cast->simple_frame.stride),
-		SPA_PARAM_BUFFERS_align,   SPA_POD_Int(XDPW_PWR_ALIGN));
+		SPA_PARAM_BUFFERS_align,   SPA_POD_Int(XDPW_PWR_ALIGN),
+		SPA_PARAM_BUFFERS_dataType,SPA_POD_CHOICE_FLAGS_Int(1<<SPA_DATA_MemPtr));
 
 	params[1] = spa_pod_builder_add_object(&b,
 		SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,