diff --git a/Makefile b/Makefile
index 9069950..845029c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 compile:
 	bison --verbose -d Monicelli.y
 	flex -P mc Monicelli.ll
-	g++ -std=c++11 -DYYDEBUG=0 Monicelli.tab.c lex.mc.c Nodes.cpp main.cpp -o mcc
+	g++ -Wall -std=c++11 -DYYDEBUG=0 Monicelli.tab.c lex.mc.c Nodes.cpp main.cpp -o mcc
 	rm Monicelli.tab.* lex.mc.c
 
 graph:
diff --git a/Monicelli.ll b/Monicelli.ll
index 7384bfc..f1ca7c7 100644
--- a/Monicelli.ll
+++ b/Monicelli.ll
@@ -12,6 +12,7 @@ using namespace monicelli;
 %}
 
 %option noyywrap
+%option nounput
 
 DIGIT [0-9]
 HEXDIGIT [0-9a-zA-Z]