diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index cbfb8b0c710..4d8b91815cb 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -1708,7 +1708,7 @@ ul.oe-arrow-list li.oe-arrow-list-selected .oe-arrow-list-after {
 /* Buttons */
 /***********/
 
-a.button:link, a.button:visited, button, input[type='submit'], input[type='reset'] {
+.openerp a.button:link, a.button:visited, button, input[type='submit'], input[type='reset'] {
   display: inline-block;
   border: 1px solid #ababab;
   color: #404040;
@@ -1741,7 +1741,7 @@ a.button:link, a.button:visited, button, input[type='submit'], input[type='reset
   outline: none;
 }
 
-a.button:hover, button:hover, input[type='submit']:hover, input[type='reset']:hover {
+.openerp a.button:hover, button:hover, input[type='submit']:hover, input[type='reset']:hover {
   background: #e3e3e3, none;
   -o-background-size: 100% 100%;
   -moz-background-size: 100% 100%;
@@ -1755,7 +1755,7 @@ a.button:hover, button:hover, input[type='submit']:hover, input[type='reset']:ho
   cursor: pointer;
 }
 
-a.button:focus, button:focus, input[type='submit']:focus, input[type='reset']:focus {
+.openerp a.button:focus, button:focus, input[type='submit']:focus, input[type='reset']:focus {
   border: 1px solid #80bfff;
   background: #e3e3e3, none;
   -o-background-size: 100% 100%;
@@ -1773,7 +1773,7 @@ a.button:focus, button:focus, input[type='submit']:focus, input[type='reset']:fo
   -box-shadow: 0 0 3px #80bfff, 0 1px 1px rgba(255, 255, 255, 0.8) inset;
 }
 
-a.button:active, a.button.active, button:active, button.active, input[type='submit']:active, input[type='submit'].active, input[type='reset']:active, input[type='reset'].active {
+.openerp a.button:active, a.button.active, button:active, button.active, input[type='submit']:active, input[type='submit'].active, input[type='reset']:active, input[type='reset'].active {
   background: #e3e3e3;
   background: -moz-linear-gradient(top, #e3e3e3, #f6f6f6) #1b468f;
   background: -webkit-gradient(linear, left top, left bottom, from(#e3e3e3), to(#f6f6f6)) #1b468f;
@@ -1784,7 +1784,7 @@ a.button:active, a.button.active, button:active, button.active, input[type='subm
   -box-shadow: none, 0 0 0 transparent;
 }
 
-a.button.disabled, button:disabled, input[type='submit']:disabled, input[type='reset']:disabled {
+.openerp a.button.disabled, button:disabled, input[type='submit']:disabled, input[type='reset']:disabled {
   background: #efefef !important;
   border: 1px solid #d1d1d1 !important;
   font-weight: 550;