diff --git a/hotspot/src/share/vm/opto/type.cpp b/hotspot/src/share/vm/opto/type.cpp
index 92d4e6b70f..7e839ba659 100644
--- a/hotspot/src/share/vm/opto/type.cpp
+++ b/hotspot/src/share/vm/opto/type.cpp
@@ -2552,16 +2552,18 @@ TypeOopPtr::TypeOopPtr(TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int o
         } else if (klass() == ciEnv::current()->Class_klass() &&
                    _offset >= InstanceMirrorKlass::offset_of_static_fields()) {
           // Static fields
-          assert(o != NULL, "must be constant");
           ciField* field = NULL;
           if (o != NULL) {
             ciInstanceKlass* k = o->as_instance()->java_lang_Class_klass()->as_instance_klass();
             field = k->get_field_by_offset(_offset, true);
           }
-          assert(field != NULL, "missing field");
-          BasicType basic_elem_type = field->layout_type();
-          _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT ||
-                                                       basic_elem_type == T_ARRAY);
+          if (field != NULL) {
+            BasicType basic_elem_type = field->layout_type();
+            _is_ptr_to_narrowoop = UseCompressedOops && is_reference_type(basic_elem_type);
+          } else {
+            // unsafe access
+            _is_ptr_to_narrowoop = UseCompressedOops;
+          }
         } else {
           // Instance fields which contains a compressed oop references.
           field = ik->get_field_by_offset(_offset, false);