diff --git a/src/Airports/GenAirports850/rwy_gen.cxx b/src/Airports/GenAirports850/rwy_gen.cxx
index 34d04b92..a9802d6a 100644
--- a/src/Airports/GenAirports850/rwy_gen.cxx
+++ b/src/Airports/GenAirports850/rwy_gen.cxx
@@ -183,10 +183,10 @@ void Runway::gen_runway_section( const tgPolygon& runway,
         }
 
         if ( startw_pct == 0.0f ) {
-            lshoulder_width = 11.0;
+            lshoulder_width = width/4.0;
         }
         if ( endw_pct == 1.0f ) {
-            rshoulder_width = 11.0;
+            rshoulder_width = width/4.0;
         }
     } else {  
         // We add a fake shoulder if the runway has an asphalt or concrete surface
@@ -882,4 +882,4 @@ void Runway::BuildShoulder( tgpolygon_list& rwy_polys,
         rwy_polys.push_back( shoulder_polys[i] );
         accum.Add( shoulder );
     }
-}
\ No newline at end of file
+}