diff --git a/util/opt/patterns b/util/opt/patterns
index d6b685431..24e72d427 100644
--- a/util/opt/patterns
+++ b/util/opt/patterns
@@ -355,7 +355,7 @@ loc loc loc $1==0 && $2==0 && $3==0 :    zer 6
 zer loc defined($1) && $2==0:   zer $1+w
 #endif
 loi loc and $1==1 && $3==w && ($2&255)==255:    loi 1
-loi loc loc cii $1<w && $2==w: loi $1 loc $2 loc $3 cuu
+loi loc loc cii $1<w && $2==w: loi $1 loc $2 loc $3 cui
 cmp teq :       cms p   teq
 cmp tne :       cms p   tne
 cmu teq defined($1):    cms $1  teq