diff --git a/pipewire-jack/src/metadata.c b/pipewire-jack/src/metadata.c
index c2f87f7ef..4cbfcc722 100644
--- a/pipewire-jack/src/metadata.c
+++ b/pipewire-jack/src/metadata.c
@@ -188,7 +188,7 @@ static int update_property(struct client *c,
 		} else if (prop == NULL) {
 			if (desc == NULL)
 				desc = add_description(subject);
-			prop = add_property(desc, key, value, type);
+			add_property(desc, key, value, type);
 			change = PropertyCreated;
 			changed++;
 		} else {
diff --git a/pipewire-jack/src/pipewire-jack.c b/pipewire-jack/src/pipewire-jack.c
index 38d7755ca..9f8668bff 100644
--- a/pipewire-jack/src/pipewire-jack.c
+++ b/pipewire-jack/src/pipewire-jack.c
@@ -1432,7 +1432,6 @@ static int client_node_set_io(void *object,
 
 	if (mem_id == SPA_ID_INVALID) {
 		mm = ptr = NULL;
-		size = 0;
 	} else {
 		mm = pw_mempool_map_id(c->pool, mem_id,
 				PW_MEMMAP_FLAG_READWRITE, offset, size, tag);
@@ -1906,7 +1905,6 @@ static int client_node_port_set_io(void *object,
 
         if (mem_id == SPA_ID_INVALID) {
                 mm = ptr = NULL;
-                size = 0;
         }
         else {
 		mm = pw_mempool_map_id(c->pool, mem_id,