diff --git a/mozilla/layout/forms/resources/content/select.xml b/mozilla/layout/forms/resources/content/select.xml
index f7dd78d56e5..409c32a348e 100644
--- a/mozilla/layout/forms/resources/content/select.xml
+++ b/mozilla/layout/forms/resources/content/select.xml
@@ -654,7 +654,7 @@
         ]]>
       </constructor>
     </implementation>
-    <content sizetopopup="true">
+    <content sizetopopup="always">
         <xul:hbox class="select-label-box" flex="1">
           <xul:label flex="1" value=" " inherits="value=label"/>
         </xul:hbox>
diff --git a/mozilla/layout/html/forms/resources/content/select.xml b/mozilla/layout/html/forms/resources/content/select.xml
index f7dd78d56e5..409c32a348e 100644
--- a/mozilla/layout/html/forms/resources/content/select.xml
+++ b/mozilla/layout/html/forms/resources/content/select.xml
@@ -654,7 +654,7 @@
         ]]>
       </constructor>
     </implementation>
-    <content sizetopopup="true">
+    <content sizetopopup="always">
         <xul:hbox class="select-label-box" flex="1">
           <xul:label flex="1" value=" " inherits="value=label"/>
         </xul:hbox>