diff --git a/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.cpp b/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.cpp
index f325556f64..70084c4def 100644
--- a/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.cpp
+++ b/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.cpp
@@ -44,6 +44,13 @@ StringPairArray& StringPairArray::operator= (const StringPairArray& other)
     return *this;
 }
 
+void StringPairArray::swapWith (StringPairArray& other)
+{
+    std::swap (ignoreCase, other.ignoreCase);
+    keys.swapWith (other.keys);
+    values.swapWith (other.values);
+}
+
 bool StringPairArray::operator== (const StringPairArray& other) const
 {
     for (int i = keys.size(); --i >= 0;)
diff --git a/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.h b/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.h
index 8a46266ff7..a3acd993ec 100644
--- a/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.h
+++ b/Subtrees/beast/modules/beast_core/text/beast_StringPairArray.h
@@ -49,6 +49,9 @@ public:
     /** Copies the contents of another string array into this one */
     StringPairArray& operator= (const StringPairArray& other);
 
+    /** Swap the contents of this array with another. */
+    void swapWith (StringPairArray& other);
+
     //==============================================================================
     /** Compares two arrays.
         Comparisons are case-sensitive.