diff --git a/src/tools/pw-dump.c b/src/tools/pw-dump.c
index d2b0f749f..db4aa54da 100644
--- a/src/tools/pw-dump.c
+++ b/src/tools/pw-dump.c
@@ -449,7 +449,7 @@ static void put_pod_value(struct data *d, const char *key, const struct spa_type
 		break;
 	}
 	case SPA_TYPE_None:
-		put_value(d, NULL, "null");
+		put_value(d, NULL, NULL);
 		break;
 	}
 }