diff --git a/lex.c b/lex.c
index 06ee423..60dd8be 100644
--- a/lex.c
+++ b/lex.c
@@ -42,12 +42,12 @@ char	yytext[2048];
 
 #define Token(y)        tl_yylval = tl_nn(y,ZN,ZN); return y
 
-int
+static int
 isalnum_(int c)
 {       return (isalnum(c) || c == '_');
 }
 
-int
+static int
 hash(char *s)
 {       int h=0;