diff --git a/Makefile b/Makefile
index 9f52cce..59d3618 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ DEBUG=1
 #STATIC=1
 
 
-CFLAGS = -Wall
+CFLAGS = -Wall --std=gnu99
 LDFLAGS =
 LDLIBS =
 
diff --git a/lex.l b/lex.l
index 3c637c6..c527f07 100644
--- a/lex.l
+++ b/lex.l
@@ -32,6 +32,7 @@ char *strcpy();
 %}
 
 %option nounput
+%option noinput
 
 digit		[0-9]
 hexdigit	[0-9a-fA-F]