diff --git a/testing/scripts/build-umlrootfs b/testing/scripts/build-umlrootfs
index 4a561b857..84413b908 100755
--- a/testing/scripts/build-umlrootfs
+++ b/testing/scripts/build-umlrootfs
@@ -221,6 +221,11 @@ then
     echo -n " --enable-gcrypt" >> $INSTALLSHELL
 fi
 
+if [ "$USE_SOCKET_DEFAULT" = "yes" ]
+then
+    echo -n " --enable-socket-default" >> $INSTALLSHELL
+fi
+
 echo "" >> $INSTALLSHELL
 echo "make" >> $INSTALLSHELL
 echo "make install" >> $INSTALLSHELL
diff --git a/testing/testing.conf b/testing/testing.conf
index d360c1e78..bcbc56da2 100755
--- a/testing/testing.conf
+++ b/testing/testing.conf
@@ -52,6 +52,7 @@ USE_LEAK_DETECTIVE="yes"
 USE_LOAD_TESTS="yes"
 USE_TEST_VECTORS="yes"
 USE_GCRYPT="yes"
+USE_SOCKET_DEFAULT="yes"
 
 # Gentoo linux root filesystem
 ROOTFS=$UMLTESTDIR/gentoo-fs-20090615.tar.bz2