diff --git a/src/share/vm/opto/memnode.cpp b/src/share/vm/opto/memnode.cpp
index e3880ea4e595e9ae2a3ecf66bfd747b2404da159..304e6802f02f220be16daf461eb1a0a214b911d8 100644
--- a/src/share/vm/opto/memnode.cpp
+++ b/src/share/vm/opto/memnode.cpp
@@ -4077,6 +4077,7 @@ Node* MergeMemNode::memory_at(uint alias_idx) const {
     n = base_memory();
     assert(Node::in_dump()
            || n == NULL || n->bottom_type() == Type::TOP
+           || n->adr_type() == NULL // address is TOP
            || n->adr_type() == TypePtr::BOTTOM
            || n->adr_type() == TypeRawPtr::BOTTOM
            || Compile::current()->AliasLevel() == 0,