diff --git a/Intel8080/src/Makefile b/Intel8080/src/Makefile
index 79d4063..b5fde43 100644
--- a/Intel8080/src/Makefile
+++ b/Intel8080/src/Makefile
@@ -13,7 +13,7 @@ PCH = stdafx.h.gch
 
 all: opt
 
-opt: CXXFLAGS += -DNDEBUG -march=native -O3
+opt: CXXFLAGS += -DNDEBUG -march=native -O3 -flto
 opt: $(LIB)
 
 debug: CXXFLAGS += -g -D_DEBUG
diff --git a/LR35902/src/Makefile b/LR35902/src/Makefile
index f8e4ccb..ef4d339 100644
--- a/LR35902/src/Makefile
+++ b/LR35902/src/Makefile
@@ -13,7 +13,7 @@ PCH = stdafx.h.gch
 
 all: opt
 
-opt: CXXFLAGS += -DNDEBUG -march=native -O3
+opt: CXXFLAGS += -DNDEBUG -march=native -O3 -flto
 opt: $(LIB)
 
 debug: CXXFLAGS += -g -D_DEBUG
diff --git a/src/Makefile b/src/Makefile
index 83b2128..04c43f8 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -13,7 +13,7 @@ PCH = stdafx.h.gch
 
 all: opt
 
-opt: CXXFLAGS += -DNDEBUG -march=native -O3
+opt: CXXFLAGS += -DNDEBUG -march=native -O3 -flto
 opt: $(LIB)
 
 debug: CXXFLAGS += -g -D_DEBUG