diff --git a/mozilla/layout/forms/resources/content/select.xml b/mozilla/layout/forms/resources/content/select.xml
index 5db28fa734f..da776964cf8 100644
--- a/mozilla/layout/forms/resources/content/select.xml
+++ b/mozilla/layout/forms/resources/content/select.xml
@@ -70,8 +70,8 @@
              selection.select(row.value);
              select.selectElement.setOptionsSelectedByIndex(row.value, row.value,
                                                             true, true, false, false);
-             if ("onchange" in this)
-               this.onchange();
+             if ("onchange" in select)
+               select.onchange();
            }
          }
       ]]>
diff --git a/mozilla/layout/html/forms/resources/content/select.xml b/mozilla/layout/html/forms/resources/content/select.xml
index 5db28fa734f..da776964cf8 100644
--- a/mozilla/layout/html/forms/resources/content/select.xml
+++ b/mozilla/layout/html/forms/resources/content/select.xml
@@ -70,8 +70,8 @@
              selection.select(row.value);
              select.selectElement.setOptionsSelectedByIndex(row.value, row.value,
                                                             true, true, false, false);
-             if ("onchange" in this)
-               this.onchange();
+             if ("onchange" in select)
+               select.onchange();
            }
          }
       ]]>