diff --git a/guile-readline/readline.c b/guile-readline/readline.c
index 188ad8f73..d66f012dd 100644
--- a/guile-readline/readline.c
+++ b/guile-readline/readline.c
@@ -468,7 +468,7 @@ static int
 match_paren (int x, int k)
 {
   int tmp;
-  fd_set readset;
+  SELECT_TYPE readset;
   struct timeval timeout;
   
   rl_insert (x, k);