diff --git a/toolkit/content/widgets/textbox.xml b/toolkit/content/widgets/textbox.xml
index e57d6631c42..84bf69d7934 100644
--- a/toolkit/content/widgets/textbox.xml
+++ b/toolkit/content/widgets/textbox.xml
@@ -17,6 +17,7 @@
     </resources>
 
     <content>
+      <children/>
       <xul:hbox class="textbox-input-box" flex="1" xbl:inherits="context">
         <html:input class="textbox-input" flex="1" anonid="input"
                     xbl:inherits="onfocus,onblur,value,type,maxlength,disabled,size,readonly,tabindex,accesskey"/>
diff --git a/xpfe/global/resources/content/bindings/textbox.xml b/xpfe/global/resources/content/bindings/textbox.xml
index 24c22e7bbd5..b702c08c921 100644
--- a/xpfe/global/resources/content/bindings/textbox.xml
+++ b/xpfe/global/resources/content/bindings/textbox.xml
@@ -17,6 +17,7 @@
     </resources>
 
     <content>
+      <children/>
       <xul:hbox class="textbox-input-box" flex="1" xbl:inherits="context">
         <html:input class="textbox-input" flex="1" anonid="input"
                     xbl:inherits="onfocus,onblur,value,type,maxlength,disabled,size,readonly,tabindex,accesskey"/>