diff --git a/update.php b/update.php
index 90251c2f3..f33458c2e 100755
--- a/update.php
+++ b/update.php
@@ -10,6 +10,14 @@
 	require_once "autoload.php";
 	require_once "functions.php";
 
+
+	if (php_sapi_name() != "cli") {
+		header("Content-type: text/plain");
+		printf("Please run this script using PHP CLI executable (you're using PHP SAPI: %s, PHP_EXECUTABLE is set to '%s')\n",
+			php_sapi_name(), Config::get(Config::PHP_EXECUTABLE));
+		exit(1);
+	}
+
 	Config::sanity_check();
 
 	function make_stampfile(string $filename): bool {
@@ -100,12 +108,6 @@
 		$options_map[$command . $data["suffix"]] = [ $data["arghelp"], $data["description"] ];
 	}
 
-	if (php_sapi_name() != "cli") {
-		header("Content-type: text/plain");
-		print "Please run this script from the command line.\n";
-		exit;
-	}
-
 	$options = getopt("", array_keys($options_map));
 
 	if ($options === false || count($options) == 0 || isset($options["help"]) ) {