diff --git a/lib/roken/seteuid.c b/lib/roken/seteuid.c
index 2582bee50..3110da293 100644
--- a/lib/roken/seteuid.c
+++ b/lib/roken/seteuid.c
@@ -48,7 +48,7 @@ RCSID("$Id$");
 #include "roken.h"
 
 int
-seteuid(int euid)
+seteuid(uid_t euid)
 {
 #ifdef HAVE_SETREUID
     return setreuid(-1, euid);