diff --git a/configure b/configure
index 9b1e3adc1379..4b6f8fc6fcd4 100755
--- a/configure
+++ b/configure
@@ -13348,7 +13348,7 @@ EOF
 fi
 
 
-MOZ_EXTENSIONS_ALL=" cookie wallet content-packs xml-rpc xmlextras help p3p pref transformiix venkman inspector irc universalchardet typeaheadfind webservices spellcheck gnomevfs negotiateauth sroaming xmlterm datetime finger cview layout-debug tasks sql xforms"
+MOZ_EXTENSIONS_ALL=" cookie wallet content-packs xml-rpc xmlextras help p3p pref transformiix venkman inspector irc universalchardet typeaheadfind webservices spellcheck gnomevfs negotiateauth sroaming xmlterm datetime finger cview layout-debug tasks sql xforms schema-validation"
 
 # Check whether --enable-extensions or --disable-extensions was given.
 if test "${enable_extensions+set}" = set; then