diff --git a/src/sao.less b/src/sao.less
index 93688f1e6d..ba07baa4bd 100644
--- a/src/sao.less
+++ b/src/sao.less
@@ -76,12 +76,6 @@ body {
 }
 
 .form {
-    & button {
-        & .ui-icon-custom {
-            background-size: 16px 16px;
-        }
-    }
-
     & .form-one2many-menu, .form-one2many-content,
     .form-many2many-menu, .form-many2many-content {
         border: 1px solid rgb(170, 170, 170);
@@ -102,3 +96,9 @@ body {
         }
     }
 }
+
+button {
+    & .ui-icon-custom {
+        background-size: 16px 16px;
+    }
+}