diff --git a/src/Docker.DotNet/QueryString.cs b/src/Docker.DotNet/QueryString.cs
index 36334b3d7..c06887491 100644
--- a/src/Docker.DotNet/QueryString.cs
+++ b/src/Docker.DotNet/QueryString.cs
@@ -42,7 +42,7 @@ public IDictionary<string, string[]> GetKeyValuePairs()
                 }
 
                 // Serialize
-                if (attribute.IsRequired || !IsDefaultOfType(value))
+                if (value != null)
                 {
                     var keyStr = attribute.Name;
                     string[] valueStr;
@@ -113,16 +113,6 @@ private Tuple<PropertyInfo, TAttribType>[] FindAttributedPublicProperties<TValue
             return attributedPublicProperties.Select(pi =>
                 new Tuple<PropertyInfo, TAttribType>(pi, pi.GetCustomAttribute<TAttribType>())).ToArray();
         }
-
-        private static bool IsDefaultOfType(object o)
-        {
-            if (o is ValueType)
-            {
-                return o.Equals(Activator.CreateInstance(o.GetType()));
-            }
-
-            return o == null;
-        }
     }
 
     /// <summary>
@@ -151,4 +141,4 @@ public string GetQueryString()
                             v => $"{Uri.EscapeUriString(_key)}={Uri.EscapeDataString(v)}"));
         }
     }
-}
\ No newline at end of file
+}