diff --git a/pipewire-pulseaudio/src/internal.h b/pipewire-pulseaudio/src/internal.h
index 280088557..d88130eb8 100644
--- a/pipewire-pulseaudio/src/internal.h
+++ b/pipewire-pulseaudio/src/internal.h
@@ -172,7 +172,7 @@ do {									\
 pa_proplist* pa_proplist_new_props(struct pw_properties *props);
 pa_proplist* pa_proplist_new_dict(struct spa_dict *dict);
 int pa_proplist_update_dict(pa_proplist *p, struct spa_dict *dict);
-int pw_properties_update_proplist(struct pw_properties *props, const pa_proplist *p);
+int pw_properties_update_proplist(struct pw_properties *props, PA_CONST pa_proplist *p);
 
 struct pa_io_event {
 	struct spa_source *source;
diff --git a/pipewire-pulseaudio/src/proplist.c b/pipewire-pulseaudio/src/proplist.c
index 7ac87c43f..79010c30a 100644
--- a/pipewire-pulseaudio/src/proplist.c
+++ b/pipewire-pulseaudio/src/proplist.c
@@ -384,7 +384,7 @@ int pa_proplist_equal(PA_CONST pa_proplist *a, PA_CONST pa_proplist *b)
 
 
 int pw_properties_update_proplist(struct pw_properties *props,
-		     const pa_proplist *p)
+		     PA_CONST pa_proplist *p)
 {
 	void *state = NULL;
 	const char *key, *val;