diff --git a/src/examples/video-play.c b/src/examples/video-play.c
index 2b4e85552..9ced483ff 100644
--- a/src/examples/video-play.c
+++ b/src/examples/video-play.c
@@ -231,7 +231,7 @@ on_stream_format_changed(void *_data, const struct spa_pod *format)
 	struct pw_type *t = data->t;
 	uint8_t params_buffer[1024];
 	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
-	struct spa_pod *params[2];
+	const struct spa_pod *params[2];
 	Uint32 sdl_format;
 	void *d;
 
diff --git a/src/examples/video-src.c b/src/examples/video-src.c
index 829666bd1..d272c7254 100644
--- a/src/examples/video-src.c
+++ b/src/examples/video-src.c
@@ -167,7 +167,7 @@ on_stream_format_changed(void *_data, const struct spa_pod *format)
 	struct pw_type *t = data->t;
 	uint8_t params_buffer[1024];
 	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
-	struct spa_pod *params[2];
+	const struct spa_pod *params[2];
 
 	if (format == NULL) {
 		pw_stream_finish_format(stream, 0, NULL, 0);
diff --git a/src/pipewire/stream.c b/src/pipewire/stream.c
index a39a5d8f3..dc97cd472 100644
--- a/src/pipewire/stream.c
+++ b/src/pipewire/stream.c
@@ -1045,7 +1045,7 @@ set_init_params(struct pw_stream *stream,
 	impl->n_init_params = n_init_params;
 }
 
-static void set_params(struct pw_stream *stream, int n_params, struct spa_pod **params)
+static void set_params(struct pw_stream *stream, int n_params, const struct spa_pod **params)
 {
 	struct stream *impl = SPA_CONTAINER_OF(stream, struct stream, this);
 	int i;
@@ -1193,7 +1193,7 @@ int pw_stream_disconnect(struct pw_stream *stream)
 
 void pw_stream_finish_format(struct pw_stream *stream,
 			int res,
-			struct spa_pod **params,
+			const struct spa_pod **params,
 			uint32_t n_params)
 {
 	struct stream *impl = SPA_CONTAINER_OF(stream, struct stream, this);
diff --git a/src/pipewire/stream.h b/src/pipewire/stream.h
index 0aae2ecbb..44588c9e5 100644
--- a/src/pipewire/stream.h
+++ b/src/pipewire/stream.h
@@ -289,7 +289,7 @@ int pw_stream_disconnect(struct pw_stream *stream);
 void
 pw_stream_finish_format(struct pw_stream *stream,	/**< a \ref pw_stream */
 			int res,			/**< a result code */
-			struct spa_pod **params,	/**< an array of params. The params should
+			const struct spa_pod **params,	/**< an array of params. The params should
 							  *  ideally contain parameters for doing
 							  *  buffer allocation. */
 			uint32_t n_params		/**< number of elements in \a params */);