diff --git a/Makefile b/Makefile
index 831c736..ecd1a5f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,8 +18,8 @@ CFLAGS += -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -pedantic
 CFLAGS += -D_XOPEN_SOURCE
 
 CFLAGS += -std=c99
-CFLAGS += -Os
-LDFLAGS += -Os
+CFLAGS += -Os -flto
+LDFLAGS += -Os -flto
 
 -include source/Makefile