diff --git a/src/smt/smt_context_pp.cpp b/src/smt/smt_context_pp.cpp
index b06b2f463..d04165c5b 100644
--- a/src/smt/smt_context_pp.cpp
+++ b/src/smt/smt_context_pp.cpp
@@ -238,7 +238,7 @@ namespace smt {
                     out << "equivalence classes:\n";
                     first = false;
                 }
-                out << "#" << n->get_id() << " -> #" << r->get_id() << "\n";
+                out << "#" << n->get_id() << " -> #" << r->get_id() << ": ";
                 out << mk_pp(n, m_manager) << " -> " << mk_pp(r, m_manager) << "\n";
             }
         }
diff --git a/src/smt/theory_seq.cpp b/src/smt/theory_seq.cpp
index 3c3d82402..61c09b020 100644
--- a/src/smt/theory_seq.cpp
+++ b/src/smt/theory_seq.cpp
@@ -1987,8 +1987,8 @@ void theory_seq::add_at_axiom(expr* e) {
     expr* s, *i;
     VERIFY(m_util.str.is_at(e, s, i));
     expr_ref x(m), y(m), lx(m), le(m), xey(m), zero(m), one(m), len_e(m), len_x(m);
-    x     = mk_skolem(m_at_left, s);
-    y     = mk_skolem(m_at_right, s);
+    x     = mk_skolem(m_at_left, s, i);
+    y     = mk_skolem(m_at_right, s, i);
     xey   = mk_concat(x, e, y);
     zero  = m_autil.mk_int(0);
     one   = m_autil.mk_int(1);