diff --git a/install/asterisk-install.sh b/install/asterisk-install.sh
index d6307c288..202c12e10 100644
--- a/install/asterisk-install.sh
+++ b/install/asterisk-install.sh
@@ -49,6 +49,7 @@ Choose Asterisk version to install:
 EOF
 read -rp "Enter choice [1-3]: " ASTERISK_CHOICE
 
+CERTIFIED=0
 case "$ASTERISK_CHOICE" in
 2)
   ASTERISK_VERSION="$LTS_VERSION"