1 files changed, 2 insertions, 2 deletions
diff --git a/common/tio.c b/common/tio.c
index 3b81a55..f28ac91 100644
--- a/common/tio.c
+++ b/common/tio.c
@@ -277,8 +277,8 @@ int tio_read(TFILE *fp, void *buf, size_t count)
     }
     else if ((rv < 0) && (errno != EINTR) && (errno != EAGAIN))
       return -1;        /* something went wrong with the read */
-    /* skip the read part in the buffer */
-    fp->readbuffer.len = rv;
+    else if (rv > 0)
+      fp->readbuffer.len = rv;  /* skip the read part in the buffer */
 #ifdef DEBUG_TIO_STATS
     fp->bytesread += rv;
 #endif /* DEBUG_TIO_STATS */