diff --git a/AK/FlyString.cpp b/AK/FlyString.cpp
index c537ac14e6e..e320b95c2d4 100644
--- a/AK/FlyString.cpp
+++ b/AK/FlyString.cpp
@@ -63,6 +63,10 @@ FlyString::FlyString(const String& string)
 {
     if (string.is_null())
         return;
+    if (string.impl()->is_fly()) {
+        m_impl = string.impl();
+        return;
+    }
     auto it = fly_impls().find(const_cast<StringImpl*>(string.impl()));
     if (it == fly_impls().end()) {
         fly_impls().set(const_cast<StringImpl*>(string.impl()));
diff --git a/AK/FlyString.h b/AK/FlyString.h
index cbab71a26d1..8f92396928b 100644
--- a/AK/FlyString.h
+++ b/AK/FlyString.h
@@ -33,10 +33,30 @@ namespace AK {
 class FlyString {
 public:
     FlyString() {}
+    FlyString(const FlyString& other)
+        : m_impl(other.impl())
+    {
+    }
+    FlyString(FlyString&& other)
+        : m_impl(move(other.m_impl))
+    {
+    }
     FlyString(const String&);
     FlyString(const StringView&);
     FlyString(const char*);
 
+    FlyString& operator=(const FlyString& other)
+    {
+        m_impl = other.m_impl;
+        return *this;
+    }
+
+    FlyString& operator=(FlyString&& other)
+    {
+        m_impl = move(other.m_impl);
+        return *this;
+    }
+
     bool is_empty() const { return !m_impl || !m_impl->length(); }
     bool is_null() const { return !m_impl; }