1 files changed, 1 insertions, 0 deletions
diff --git a/src/wasm2js.h b/src/wasm2js.h
index 080315490..518a8037b 100644
--- a/src/wasm2js.h
+++ b/src/wasm2js.h
@@ -525,6 +525,7 @@ void Wasm2JSBuilder::addEsmExportsAndInstantiate(Ref ast, Module *wasm, Name fun
     flattenAppend(ast, ValueBuilder::makeName(name));
   }
   for (auto& seg : wasm->memory.segments) {
+    assert(!seg.isPassive && "passive segments not implemented yet");
     std::ostringstream out;
     out << "assign" << funcName.str << "("
       << constOffset(seg)