diff --git a/sbin/testEnvironment.pl b/sbin/testEnvironment.pl
index ed20752c7..13bf034b9 100644
--- a/sbin/testEnvironment.pl
+++ b/sbin/testEnvironment.pl
@@ -93,6 +93,7 @@ checkModule("POSIX");
 checkModule("List::Util");
 checkModule("Color::Calc");
 checkModule("Text::Aspell",0.01,2);
+checkModule("Locale::US");
 
 ###################################
 # Checking WebGUI