diff --git a/ChangeLog b/ChangeLog
index f7004f2f..92341ad5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,9 @@ What's New for OpenJPEG
 ! : changed
 + : added
 
+May 22, 2008
+* [antonin] fixed a bug in j2k.c (j2k_write_sod) that allowed to get negative rates, thanks zhong1985624 for pointing this.
+
 May 22, 2008
 * [antonin] additional test to avoid crash due to invalid image size, patch by Christopher Layne
 
diff --git a/libopenjpeg/j2k.c b/libopenjpeg/j2k.c
index bd4a1bd6..563efd68 100644
--- a/libopenjpeg/j2k.c
+++ b/libopenjpeg/j2k.c
@@ -1438,7 +1438,11 @@ static void j2k_write_sod(opj_j2k_t *j2k, void *tile_coder) {
 	
 	tcp = &cp->tcps[j2k->curtileno];
 	for (layno = 0; layno < tcp->numlayers; layno++) {
-		tcp->rates[layno] -= tcp->rates[layno] ? (j2k->sod_start / (cp->th * cp->tw)) : 0;
+		if (tcp->rates[layno]>(j2k->sod_start / (cp->th * cp->tw))) {
+			tcp->rates[layno]-=(j2k->sod_start / (cp->th * cp->tw));
+		} else if (tcp->rates[layno]) {
+			tcp->rates[layno]=1;
+		}
 	}
 	if(j2k->cur_tp_num == 0){
 		tcd->tcd_image->tiles->packno = 0;