diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 53004614f68..8c3393dd08e 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -7039,6 +7039,10 @@ function getLanguageCodeFromCountryCode($countrycode)
     		}
     	}
 	}
+	else
+	{
+        dol_syslog("Warning Exention php-intl is not available", LOG_WARNING);
+	}
 
 	return null;
 }