diff --git a/userspace/engine/rule_loader_compiler.cpp b/userspace/engine/rule_loader_compiler.cpp
index 6f8665dc..1c6f236f 100644
--- a/userspace/engine/rule_loader_compiler.cpp
+++ b/userspace/engine/rule_loader_compiler.cpp
@@ -353,7 +353,6 @@ void rule_loader::compiler::compile_macros_infos(
 		indexed_vector<list_info>& lists,
 		indexed_vector<macro_info>& out) const
 {
-	std::set<std::string> used;
 	for (auto &m : col.macros())
 	{
 		macro_info entry = m;