diff --git a/build/meta/com/google/android/update-binary b/build/meta/com/google/android/update-binary
index ebd8d7e..b0e096b 100644
--- a/build/meta/com/google/android/update-binary
+++ b/build/meta/com/google/android/update-binary
@@ -1,5 +1,6 @@
 #!/sbin/sh
 
+OUTFD="/proc/self/fd/$2"
 ZIP=$3
 
 exec_util() {
@@ -19,6 +20,11 @@ set_owner() {
   exec_util "chown $1:$2 $3"
 }
 
+ui_print() {
+  echo "ui_print $1" > "$OUTFD";
+  echo "ui_print" > "$OUTFD";
+}
+
 ui_print "*****************"
 ui_print "MindTheGapps installer"
 ui_print "*****************"