diff --git a/src/pipewire/stream.c b/src/pipewire/stream.c
index fb22466d7..32199e902 100644
--- a/src/pipewire/stream.c
+++ b/src/pipewire/stream.c
@@ -582,6 +582,7 @@ static int impl_port_use_buffers(struct spa_node *node, enum spa_direction direc
 	struct stream *impl = SPA_CONTAINER_OF(node, struct stream, impl_node);
 	struct pw_stream *stream = &impl->this;
 	struct pw_type *t = impl->t;
+	uint32_t flags = impl->flags;
 	int i, j, prot, res;
 	int size = 0;
 
@@ -589,6 +590,9 @@ static int impl_port_use_buffers(struct spa_node *node, enum spa_direction direc
 
 	clear_buffers(stream);
 
+	if (impl->use_converter)
+		SPA_FLAG_SET(flags, PW_STREAM_FLAG_MAP_BUFFERS);
+
 	for (i = 0; i < n_buffers; i++) {
 		int buf_size = 0;
 		struct buffer *b = &impl->buffers[i];
@@ -596,7 +600,7 @@ static int impl_port_use_buffers(struct spa_node *node, enum spa_direction direc
 		b->flags = 0;
 		b->id = buffers[i]->id;
 
-		if (SPA_FLAG_CHECK(impl->flags, PW_STREAM_FLAG_MAP_BUFFERS)) {
+		if (SPA_FLAG_CHECK(flags, PW_STREAM_FLAG_MAP_BUFFERS)) {
 			for (j = 0; j < buffers[i]->n_datas; j++) {
 				struct spa_data *d = &buffers[i]->datas[j];
 				if (d->type == t->data.MemFd ||
@@ -618,7 +622,7 @@ static int impl_port_use_buffers(struct spa_node *node, enum spa_direction direc
 			} else
 				size = buf_size;
 		}
-		pw_log_info("got buffer %d %d datas, total size %d", i,
+		pw_log_info("got buffer %d %d datas, mapped size %d", i,
 				buffers[i]->n_datas, size);
 	}
 	impl->n_buffers = n_buffers;