diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index 1088df9662..4647711247 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -3763,39 +3763,39 @@ input[type="submit"].btn.btn-mini {
   *zoom: 1;
 }
 
-.btn-group-vertical .btn {
+.btn-group-vertical > .btn {
   display: block;
   float: none;
-  width: 100%;
+  max-width: 100%;
   -webkit-border-radius: 0;
      -moz-border-radius: 0;
           border-radius: 0;
 }
 
-.btn-group-vertical .btn + .btn {
+.btn-group-vertical > .btn + .btn {
   margin-top: -1px;
   margin-left: 0;
 }
 
-.btn-group-vertical .btn:first-child {
+.btn-group-vertical > .btn:first-child {
   -webkit-border-radius: 4px 4px 0 0;
      -moz-border-radius: 4px 4px 0 0;
           border-radius: 4px 4px 0 0;
 }
 
-.btn-group-vertical .btn:last-child {
+.btn-group-vertical > .btn:last-child {
   -webkit-border-radius: 0 0 4px 4px;
      -moz-border-radius: 0 0 4px 4px;
           border-radius: 0 0 4px 4px;
 }
 
-.btn-group-vertical .btn-large:first-child {
+.btn-group-vertical > .btn-large:first-child {
   -webkit-border-radius: 6px 6px 0 0;
      -moz-border-radius: 6px 6px 0 0;
           border-radius: 6px 6px 0 0;
 }
 
-.btn-group-vertical .btn-large:last-child {
+.btn-group-vertical > .btn-large:last-child {
   -webkit-border-radius: 0 0 6px 6px;
      -moz-border-radius: 0 0 6px 6px;
           border-radius: 0 0 6px 6px;
diff --git a/less/button-groups.less b/less/button-groups.less
index c830852b2b..d6054c8085 100644
--- a/less/button-groups.less
+++ b/less/button-groups.less
@@ -203,25 +203,25 @@
   display: inline-block; // makes buttons only take up the width they need
   .ie7-inline-block();
 }
-.btn-group-vertical .btn {
+.btn-group-vertical > .btn {
   display: block;
   float: none;
-  width: 100%;
+  max-width: 100%;
   .border-radius(0);
 }
-.btn-group-vertical .btn + .btn {
+.btn-group-vertical > .btn + .btn {
   margin-left: 0;
   margin-top: -1px;
 }
-.btn-group-vertical .btn:first-child {
+.btn-group-vertical > .btn:first-child {
   .border-radius(@baseBorderRadius @baseBorderRadius 0 0);
 }
-.btn-group-vertical .btn:last-child {
+.btn-group-vertical > .btn:last-child {
   .border-radius(0 0 @baseBorderRadius @baseBorderRadius);
 }
-.btn-group-vertical .btn-large:first-child {
+.btn-group-vertical > .btn-large:first-child {
   .border-radius(@borderRadiusLarge @borderRadiusLarge 0 0);
 }
-.btn-group-vertical .btn-large:last-child {
+.btn-group-vertical > .btn-large:last-child {
   .border-radius(0 0 @borderRadiusLarge @borderRadiusLarge);
 }