diff --git a/net_scope.cc b/net_scope.cc
index 269ef4a56..0ac1265cf 100644
--- a/net_scope.cc
+++ b/net_scope.cc
@@ -814,6 +814,8 @@ bool NetScope::symbol_exists(perm_string sym)
           return true;
       if (typedefs_.find(sym) != typedefs_.end())
           return true;
+      if (find_event(sym))
+          return true;
 
       return false;
 }