diff -up ./pgrep.c.ori ./pgrep.c

--- ./pgrep.c.ori	2014-09-23 13:40:36.000000000 +0200

+++ ./pgrep.c	2020-04-24 14:51:43.106245282 +0200

@@ -274,7 +274,7 @@ static int conv_uid (const char *restric

 		xwarnx(_("invalid user name: %s"), name);

 		return 0;

 	}

-	e->num = pwd->pw_uid;

+	e->num = (int) pwd->pw_uid;

 	return 1;

 }

@@ -291,7 +291,7 @@ static int conv_gid (const char *restric

 		xwarnx(_("invalid group name: %s"), name);

 		return 0;

 	}

-	e->num = grp->gr_gid;

+	e->num = (int) grp->gr_gid;

 	return 1;

 }