diff --git a/trees.c b/trees.c
index 37e35d38..685a388a 100644
--- a/trees.c
+++ b/trees.c
@@ -525,7 +525,7 @@ local void gen_bitlen(s, desc)
     }
     if (overflow == 0) return;
 
-    Trace((stderr,"\nbit length overflow\n"));
+    Tracev((stderr,"\nbit length overflow\n"));
     /* This happens for example on obj2 and pic of the Calgary corpus */
 
     /* Find the first bit length which could increase: */
@@ -552,7 +552,7 @@ local void gen_bitlen(s, desc)
             m = s->heap[--h];
             if (m > max_code) continue;
             if ((unsigned) tree[m].Len != (unsigned) bits) {
-                Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+                Tracev((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
                 s->opt_len += ((ulg)bits - tree[m].Len) * tree[m].Freq;
                 tree[m].Len = (ush)bits;
             }