diff --git a/channel.c b/channel.c
index 7f5cf19..e9834a9 100644
--- a/channel.c
+++ b/channel.c
@@ -57,7 +57,7 @@ void channel_from_cobol(void)
 void channel_to_cobol(void)
 {
   char *c;
-  for(c = msg_body; *c; c++);
+  for(c = msg_body; *c; c++) {
     *c = toupper(*c);
   }
   memset(c, ' ', msg_body_len - strlen(msg_body));