diff --git a/inc/A_extension.h b/inc/A_extension.h
index 397c18c..00667fb 100644
--- a/inc/A_extension.h
+++ b/inc/A_extension.h
@@ -11,7 +11,7 @@
 
 #include "systemc"
 
-#include <set>
+#include <unordered_set>
 
 #include "Log.h"
 #include "Registers.h"
@@ -139,7 +139,7 @@ public:
 	bool TLB_reserved(uint32_t address);
 
 private:
-	std::set<uint32_t> TLB_A_Entries;
+	std::unordered_set<uint32_t> TLB_A_Entries;
 };
 
 #endif