diff --git a/packages/tools/installer/scripts/installer b/packages/tools/installer/scripts/installer
index ea8ec4503b..ab76c2ac7a 100755
--- a/packages/tools/installer/scripts/installer
+++ b/packages/tools/installer/scripts/installer
@@ -228,7 +228,7 @@ do_install_quick() {
             mkdir -p $TMPDIR/part1 >> $LOGFILE 2>&1
 
           msg_progress_install "40" "mounting ${INSTALL_DEVICE}1 to $TMPDIR/part1"
-            mount ${INSTALL_DEVICE}1 $TMPDIR/part1 >> $LOGFILE 2>&1
+            mount -t ext4 ${INSTALL_DEVICE}1 $TMPDIR/part1 >> $LOGFILE 2>&1
 
         # installing extlinux
           msg_progress_install "50" "installing extlinux to $TMPDIR/part1"