diff --git a/lib/fog/aws/parsers/compute/describe_route_tables.rb b/lib/fog/aws/parsers/compute/describe_route_tables.rb
index 751f56a48..a08ede6d4 100755
--- a/lib/fog/aws/parsers/compute/describe_route_tables.rb
+++ b/lib/fog/aws/parsers/compute/describe_route_tables.rb
@@ -32,7 +32,7 @@ module Fog
               case name
               when 'associationSet'
                 @in_association_set = false
-              when 'routeTableAssociationId', 'routeTableId', 'main'
+              when 'routeTableAssociationId', 'routeTableId', 'subnetId', 'main'
                 @association[name] = value
               when 'item'
                 @route_table['associationSet'] << @association