diff --git a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/array_alias.rb b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/array_alias.rb
index 7047e27f1ac..77ca2e8d358 100644
--- a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/array_alias.rb
+++ b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/array_alias.rb
@@ -97,9 +97,7 @@ module Petstore
       return nil unless attributes.is_a?(Hash)
       super(attributes)
       self.class.openapi_types.each_pair do |key, type|
-        if attributes[self.class.attribute_map[key]].nil? && self.class.openapi_nullable.include?(key)
-          self.send("#{key}=", nil)
-        elsif type =~ /\AArray<(.*)>/i
+        if type =~ /\AArray<(.*)>/i
           # check to ensure the input is an array given that the attribute
           # is documented as an array but the input is not
           if attributes[self.class.attribute_map[key]].is_a?(Array)
@@ -107,6 +105,8 @@ module Petstore
           end
         elsif !attributes[self.class.attribute_map[key]].nil?
           self.send("#{key}=", _deserialize(type, attributes[self.class.attribute_map[key]]))
+        elsif attributes[self.class.attribute_map[key]].nil? && self.class.openapi_nullable.include?(key)
+          self.send("#{key}=", nil)
         end
       end
 
diff --git a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/map_alias.rb b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/map_alias.rb
index d8dc8589f7a..22ae17aeb88 100644
--- a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/map_alias.rb
+++ b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/models/map_alias.rb
@@ -93,9 +93,7 @@ module Petstore
     def build_from_hash(attributes)
       return nil unless attributes.is_a?(Hash)
       self.class.openapi_types.each_pair do |key, type|
-        if attributes[self.class.attribute_map[key]].nil? && self.class.openapi_nullable.include?(key)
-          self.send("#{key}=", nil)
-        elsif type =~ /\AArray<(.*)>/i
+        if type =~ /\AArray<(.*)>/i
           # check to ensure the input is an array given that the attribute
           # is documented as an array but the input is not
           if attributes[self.class.attribute_map[key]].is_a?(Array)
@@ -103,6 +101,8 @@ module Petstore
           end
         elsif !attributes[self.class.attribute_map[key]].nil?
           self.send("#{key}=", _deserialize(type, attributes[self.class.attribute_map[key]]))
+        elsif attributes[self.class.attribute_map[key]].nil? && self.class.openapi_nullable.include?(key)
+          self.send("#{key}=", nil)
         end
       end