diff --git a/interpreters/bas/fs.c b/interpreters/bas/fs.c
index ad67982de..ff5c3825c 100644
--- a/interpreters/bas/fs.c
+++ b/interpreters/bas/fs.c
@@ -1986,7 +1986,7 @@ long int FS_lof(int chn)
       return -1;
     }
 
- return (long int)(endpos / file[chn]->recLength);
+ return (long int)((endpos + 1) / file[chn]->recLength);
 #endif
 }