diff --git a/classes/components/Environment.m b/classes/components/Environment.m
index 52ba0b1cbc67291b79858e359ba5135d2407cbe0..eb05240567daf388c229ec622e6537d075a77e58 100644
--- a/classes/components/Environment.m
+++ b/classes/components/Environment.m
@@ -25,6 +25,7 @@ classdef Environment < Component
         pressure        double                  % [Pa] Ground pressure
         rho             double                  % [Kg/m^3] Ground air density
         gamma           double = 1.4            % [-] Gas constant
+        R               double = 287            % [-] Gas constant
     end
 
     properties(SetAccess = private)