diff --git a/mozilla/layout/forms/resources/content/select.xml b/mozilla/layout/forms/resources/content/select.xml
index da776964cf8..1cd4cd9dae7 100644
--- a/mozilla/layout/forms/resources/content/select.xml
+++ b/mozilla/layout/forms/resources/content/select.xml
@@ -590,8 +590,8 @@
       </handler>
       <handler event="keypress">
         <![CDATA[
-          event.preventDefault();
           if (event.keyCode == ' ') {
+            event.preventDefault();
             var c = this.currentIndex;
             var selection = this.outlinerBoxObject.selection;
             if (!selection.isSelected(c)) {
diff --git a/mozilla/layout/html/forms/resources/content/select.xml b/mozilla/layout/html/forms/resources/content/select.xml
index da776964cf8..1cd4cd9dae7 100644
--- a/mozilla/layout/html/forms/resources/content/select.xml
+++ b/mozilla/layout/html/forms/resources/content/select.xml
@@ -590,8 +590,8 @@
       </handler>
       <handler event="keypress">
         <![CDATA[
-          event.preventDefault();
           if (event.keyCode == ' ') {
+            event.preventDefault();
             var c = this.currentIndex;
             var selection = this.outlinerBoxObject.selection;
             if (!selection.isSelected(c)) {