diff --git a/src/archive/web/js/zul/wgt/less/combobutton.less b/src/archive/web/js/zul/wgt/less/combobutton.less
index db23a2a4..cb535965 100644
--- a/src/archive/web/js/zul/wgt/less/combobutton.less
+++ b/src/archive/web/js/zul/wgt/less/combobutton.less
@@ -7,7 +7,7 @@
 
 	&-content {
 		.fontStyle(@contentFontFamily, @baseFontSize, @fontWeightSemiBold, @buttonColor);
-		display: inline-block;
+		display: block;
 		min-height: @buttonHeight;
 		border: 1px solid @buttonBorderColor;
 		padding: @paddingSmall - 1 @paddingSize;
diff --git a/zkdoc/release-note b/zkdoc/release-note
index 7cf7aa9c..64eb0fe9 100644
--- a/zkdoc/release-note
+++ b/zkdoc/release-note
@@ -4,6 +4,7 @@ Atlantic 8.5.1
 
 * Bugs:
   ZK-3785: cleanup unused (6.5) images from themes
+  ZK-3579: combobutton not using its defined/available width
 
 * Upgrade Notes: