diff --git a/src/script_opt/CPP/RuntimeInits.cc b/src/script_opt/CPP/RuntimeInits.cc
index eba85bc9cf..b5edcc83d5 100644
--- a/src/script_opt/CPP/RuntimeInits.cc
+++ b/src/script_opt/CPP/RuntimeInits.cc
@@ -507,6 +507,9 @@ void CPP_GlobalInit::Generate(InitsManager* im, std::vector<void*>& /* inits_vec
 
     if ( attrs >= 0 )
         global->SetAttrs(im->Attributes(attrs));
+
+    if ( t->Tag() == TYPE_FUNC )
+        global->AddAttr(make_intrusive<Attr>(ATTR_IS_USED));
 }
 
 size_t generate_indices_set(int* inits, std::vector<std::vector<int>>& indices_set) {