diff --git a/modules/openapi-generator/src/main/resources/ruby-client/base_object.mustache b/modules/openapi-generator/src/main/resources/ruby-client/base_object.mustache
index f6ebfff37915..a109dd19f0a1 100644
--- a/modules/openapi-generator/src/main/resources/ruby-client/base_object.mustache
+++ b/modules/openapi-generator/src/main/resources/ruby-client/base_object.mustache
@@ -14,7 +14,9 @@
       super(attributes)
       {{/parent}}
       self.class.openapi_types.each_pair do |key, type|
-        if type =~ /\AArray<(.*)>/i
+        if attributes[self.class.attribute_map[key]].nil? && self.class.openapi_nullable.include?(key)
+          self.send("#{key}=", nil)
+        elsif 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)
@@ -22,8 +24,6 @@
           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