diff --git a/src/Environment/atmosphere.cxx b/src/Environment/atmosphere.cxx
index b7130aea3..c3b691348 100644
--- a/src/Environment/atmosphere.cxx
+++ b/src/Environment/atmosphere.cxx
@@ -19,7 +19,8 @@ ISA_layer(3,  32000,  104986,  868.019,    0.256326, 228.65, -44.50, -0.0028,  -
 ISA_layer(4,  47000,  154199,  110.906,   0.0327506, 270.65,  -2.50,       0,           0),
 ISA_layer(5,  51000,  167322,  66.9389,   0.0197670, 270.65,  -2.50,  0.0028,   0.0008534),
 ISA_layer(6,  71000,  232939,  3.95642,  0.00116833, 214.65, -58.50,  0.0020,   0.0006096),
-ISA_layer(7,  80000,  262467,  0.88628, 0.000261718, 196.65, -76.50),
+ISA_layer(7,  80000,  262467,  0.88628, 0.000261718, 196.65, -76.50,  0.0,      0.0),
+ISA_layer(8,  1.0e9,  3.28e9,  0.00001, 3.0e-9,        2.73, -270.4,  0.0,      0.0),
 };
 
 const int ISA_def_size(sizeof(ISA_def) / sizeof(ISA_layer));