diff --git a/README.md b/README.md
index 42f8a914bacf15aa4096364ae5654d50ce88da43..a97fe4706c3613d465c318f4cad0b213493bca00 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 
 ```bash
 flex hw1.l
-gcc lex.yy.c -lf -lfl
+gcc lex.yy.c -ly -lfl
 ./a.out ex1.txt
 ./a.out ex2.txt
 ```