diff --git a/src/ansi-c/ansi_c_convert_type.cpp b/src/ansi-c/ansi_c_convert_type.cpp
index 0ac0a11204a..b5904e7a664 100644
--- a/src/ansi-c/ansi_c_convert_type.cpp
+++ b/src/ansi-c/ansi_c_convert_type.cpp
@@ -257,10 +257,11 @@ void ansi_c_convert_typet::read_rec(const typet &type)
     {
       if(
         operand.id() != ID_symbol && operand.id() != ID_ptrmember &&
-        operand.id() != ID_dereference)
+        operand.id() != ID_member && operand.id() != ID_dereference)
       {
         error().source_location = source_location;
-        error() << "illegal target in assigns clause" << eom;
+        error() << "illegal target (" << operand.id_string()
+                << ") in assigns clause" << eom;
         throw 0;
       }
     }
diff --git a/src/solvers/flattening/boolbv.h b/src/solvers/flattening/boolbv.h
index 3bda86f2cfa..fc3b1484b96 100644
--- a/src/solvers/flattening/boolbv.h
+++ b/src/solvers/flattening/boolbv.h
@@ -47,7 +47,7 @@ class boolbvt:public arrayst
     message_handlert &message_handler,
     bool get_array_constraints = false)
     : arrayst(_ns, _prop, message_handler, get_array_constraints),
-      unbounded_array(unbounded_arrayt::U_AUTO),
+      unbounded_array(unbounded_arrayt::U_NONE),
       bv_width(_ns),
       bv_utils(_prop),
       functions(*this),