diff --git a/src/read.c b/src/read.c
index 5d69dce0..eb649849 100644
--- a/src/read.c
+++ b/src/read.c
@@ -13,7 +13,7 @@
 #define YY_NO_UNISTD_H
 #include "lex.yy.h"
 
-static pic_value read(int tok, yyscan_t scanner);
+static pic_value read(int, yyscan_t);
 
 #define pic (yyget_extra(scanner)->pic)
 #define yylval (yyget_extra(scanner)->yylval)
@@ -160,7 +160,6 @@ read(int tok, yyscan_t scanner)
   return val;
 }
 
-
 pic_value
 read_one(yyscan_t scanner)
 {