diff --git a/Sources/XMLCoder/Auxiliaries/XMLElement.swift b/Sources/XMLCoder/Auxiliaries/XMLElement.swift
index fec84ec2..30e82fb5 100644
--- a/Sources/XMLCoder/Auxiliaries/XMLElement.swift
+++ b/Sources/XMLCoder/Auxiliaries/XMLElement.swift
@@ -182,21 +182,17 @@ struct _XMLElement {
     }
 
     fileprivate func formatXMLAttributes(_ formatting: XMLEncoder.OutputFormatting, _ string: inout String) {
-        if #available(macOS 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *) {
-            if formatting.contains(.sortedKeys) {
-                formatSortedXMLAttributes(&string)
-                return
-            }
+        if formatting.contains(.sortedKeys) {
+            formatSortedXMLAttributes(&string)
+            return
         }
         formatUnsortedXMLAttributes(&string)
     }
 
     fileprivate func formatXMLElements(_ formatting: XMLEncoder.OutputFormatting, _ string: inout String, _ level: Int, _ cdata: Bool, _ prettyPrinted: Bool) {
-        if #available(macOS 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *) {
-            if formatting.contains(.sortedKeys) {
-                formatSortedXMLElements(&string, level, cdata, formatting, prettyPrinted)
-                return
-            }
+        if formatting.contains(.sortedKeys) {
+            formatSortedXMLElements(&string, level, cdata, formatting, prettyPrinted)
+            return
         }
         formatUnsortedXMLElements(&string, level, cdata, formatting, prettyPrinted)
     }
diff --git a/Sources/XMLCoder/Encoder/XMLEncoder.swift b/Sources/XMLCoder/Encoder/XMLEncoder.swift
index c575d25c..211acb3a 100644
--- a/Sources/XMLCoder/Encoder/XMLEncoder.swift
+++ b/Sources/XMLCoder/Encoder/XMLEncoder.swift
@@ -30,7 +30,6 @@ open class XMLEncoder {
         public static let prettyPrinted = OutputFormatting(rawValue: 1 << 0)
 
         /// Produce XML with keys sorted in lexicographic order.
-        @available(macOS 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *)
         public static let sortedKeys = OutputFormatting(rawValue: 1 << 1)
     }