diff --git a/gen/classes.cpp b/gen/classes.cpp
index a5dde05a..f5daca9f 100644
--- a/gen/classes.cpp
+++ b/gen/classes.cpp
@@ -837,9 +837,14 @@ DValue* DtoNewClass(TypeClass* tc, NewExp* newexp)
     {
         Logger::println("Resolving nested context");
         LOG_SCOPE;
+        // this value might be zero if it was not necessary to generate it ...
         LLValue* nest = gIR->func()->nestedVar;
+        // ... then revert to the this ptr if there is one
         if (!nest)
             nest = gIR->func()->thisVar;
+        // ... or just use zero, since it must be unused.
+        if (!nest)
+            nest = llvm::ConstantPointerNull::get(getVoidPtrType());
         assert(nest);
         LLValue* gep = DtoGEPi(mem,0,2,"tmp");
         nest = DtoBitCast(nest, gep->getType()->getContainedType(0));