diff --git a/lld/wasm/Symbols.cpp b/lld/wasm/Symbols.cpp
--- a/lld/wasm/Symbols.cpp
+++ b/lld/wasm/Symbols.cpp
@@ -137,7 +137,7 @@
 
 void Symbol::markLive() {
   assert(!isDiscarded());
-  if (file != NULL)
+  if (file != NULL && isDefined())
     file->markLive();
   if (auto *g = dyn_cast<DefinedGlobal>(this))
     g->global->live = true;