1 files changed, 2 insertions, 1 deletions

diff --git a/trees.c b/trees.c
index 5f6d4af..bb09554 100644
--- a/trees.c
+++ b/trees.c
@@ -1107,7 +1107,8 @@ local void compress_block(s, ltree, dtree)
         } /* literal or match pair ? */
 
         /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
-        Assert(s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
+        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+               "pendingBuf overflow");
 
     } while (lx < s->last_lit);