diff --git a/src/Airports/GenAirports850/linearfeature.cxx b/src/Airports/GenAirports850/linearfeature.cxx
index a7fc8d5c..41d0f67b 100644
--- a/src/Airports/GenAirports850/linearfeature.cxx
+++ b/src/Airports/GenAirports850/linearfeature.cxx
@@ -764,7 +764,19 @@ int LinearFeature::Finish( bool closed, unsigned int idx )
                 cur_light_contour.SetType( "RWY_RED_LIGHTS" );
                 light_delta = 10.0f;
                 break;
-            
+
+            case LF_UNIDIR_GREEN:
+                cur_light_contour.SetType( "RWY_GREEN_LIGHTS" );
+                light_delta = 10.0f;
+                break;
+
+            case LF_UNIDIR_GREEN_AMBER:
+                cur_light_contour.SetType( "RWY_GREEN_LIGHTS" );
+                alt_light_contour.SetType( "RWY_YELLOW_LIGHTS" );
+                light_delta = 10.0f;
+                alternate = true;
+                break;
+
             default:
                 // catch unknown lighting type. Allows TerraGear to exit cleanly when it comes across new light features 107 and 108
                 TG_LOG(SG_GENERAL, SG_ALERT, "LinearFeature::Finish: unknown lighting feature " << lights[i]->type );