diff --git a/src/lib/evil/evil_fcntl.c b/src/lib/evil/evil_fcntl.c
index 14d10b111c..6c556a6cd7 100644
--- a/src/lib/evil/evil_fcntl.c
+++ b/src/lib/evil/evil_fcntl.c
@@ -114,7 +114,7 @@ fcntl(int fd, int cmd, ...)
              if (length != -1L)
                res = 0;
           }
-        fl->l_len = length - fl->l_start - 1;
+        fl->l_len = length - fl->l_start;
 
         pos = _lseek(fd, fl->l_start, fl->l_whence);
         if (pos != -1L)