fix warning

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plain.cc b/src/plain.cc
index 58fbdfb3..d63ce6cf 100644
--- a/src/plain.cc
+++ b/src/plain.cc
@@ -143,7 +143,7 @@ void DilloPlain::addLine(char *Buf, uint_t BufSize)
       // Limit word length to avoid X11 coordinate
       // overflow with extremely long lines.
       while ((len = a_Misc_expand_tabs(&Buf, end, buf, sizeof(buf) - 1))) {
-         assert (len < sizeof(buf));
+         assert ((uint_t)len < sizeof(buf));
          buf[len] = '\0';
          DW2TB(dw)->addText(buf, len, widgetStyle);
       }