diff --git a/apps/px4/tests/tests_param.c b/apps/px4/tests/tests_param.c
index 8d0ac287a5..5ac9f03430 100644
--- a/apps/px4/tests/tests_param.c
+++ b/apps/px4/tests/tests_param.c
@@ -73,7 +73,7 @@ test_param(int argc, char *argv[])
 	if ((uint32_t)val != 0xa5a5a5a5)
 		errx(1, "parameter value mismatch after write");
 
-	param_export(NULL, false);
+	param_export(-1, false);
 
 	warnx("parameter test PASS");