diff --git a/src/pkg/utils/utils_cgo.go b/src/pkg/utils/utils_cgo.go
index 6874a9043..36e89d1a4 100644
--- a/src/pkg/utils/utils_cgo.go
+++ b/src/pkg/utils/utils_cgo.go
@@ -56,7 +56,7 @@ const char *TOOLBOX_SUBID_GET_UID_RANGES_SYMBOL = TOOLBOX_STRINGIFY (subid_get_u
 void
 toolbox_subid_init (void *subid_init_func)
 {
-  (* (ToolboxSubidInitFunc) subid_init_func) (NULL, NULL);
+  (* (ToolboxSubidInitFunc) subid_init_func) (NULL, stderr);
 }
 
 int