diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 336748d0c03..31fbc0ee4b3 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -49,18 +49,6 @@ if (!empty($_SERVER['MAIN_SHOW_TUNING_INFO'])) {
 	}
 }
 
-if (!function_exists('is_countable')) {
-	/**
-	 * function is_countable (to remove when php version supported will be >= 7.3)
-	 * @param mixed $c data to check if countable
-	 * @return bool
-	 */
-	function is_countable($c)
-	{
-		return is_array($c) || $c instanceof Countable;
-	}
-}
-
 /**
  * Security: WAF layer for SQL Injection and XSS Injection (scripts) protection (Filters on GET, POST, PHP_SELF).
  * Warning: Such a protection can't be enough. It is not reliable as it will alwyas be possible to bypass this. Good protection can
diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index c63ace353b3..371d687b9b7 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -35,6 +35,17 @@
 require_once 'filefunc.inc.php'; // May have been already require by main.inc.php. But may not by scripts.
 
 
+if (!function_exists('is_countable')) {
+	/**
+	 * function is_countable (to remove when php version supported will be >= 7.3)
+	 * @param mixed $c data to check if countable
+	 * @return bool
+	 */
+	function is_countable($c)
+	{
+		return is_array($c) || $c instanceof Countable;
+	}
+}
 
 /*
  * Create $conf object