diff --git a/src/terminfo.c b/src/terminfo.c
index 17ce16dabd6..8b41de4e47e 100644
--- a/src/terminfo.c
+++ b/src/terminfo.c
@@ -38,7 +38,7 @@ char *
 tparam (string, outstring, len, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
      char *string;
      char *outstring;
-     int arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9;
+     int len, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9;
 {
   char *temp;
   extern char *tparm();