diff -up ./src/polkit/polkitunixprocess.c.ori ./src/polkit/polkitunixprocess.c

--- ./src/polkit/polkitunixprocess.c.ori	2019-02-06 16:47:23.460666237 +0100

+++ ./src/polkit/polkitunixprocess.c	2019-02-06 16:47:43.846573792 +0100

@@ -211,14 +211,9 @@ polkit_unix_process_set_property (GObjec

       polkit_unix_process_set_pid (unix_process, g_value_get_int (value));

       break;

-    case PROP_UID: {

-      gint val;

-

-      val = g_value_get_int (value);

-      g_return_if_fail (val != -1);

-      polkit_unix_process_set_uid (unix_process, val);

+    case PROP_UID:

+      polkit_unix_process_set_uid (unix_process, g_value_get_int (value));

       break;

-    }

     case PROP_START_TIME:

       polkit_unix_process_set_start_time (unix_process, g_value_get_uint64 (value));