diff --git a/install_minimal/include/airtime-install.php b/install_minimal/include/airtime-install.php
index 8fe9e5ef5..faaad8d0e 100644
--- a/install_minimal/include/airtime-install.php
+++ b/install_minimal/include/airtime-install.php
@@ -71,7 +71,7 @@ if (isset($version) && ($version != false) && ($version < AIRTIME_VERSION) && !i
     exit(2);
 }
 
-if($version == false){
+if($version === false){
     echo "A version of Airtime older than 1.8.0 detected, please upgrade to 1.8.0 first.\n";
     echo "You will then be able to upgrade to 1.9.0 using this installer.\n";
     exit(3);