diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7eae0ec9..eba72b0c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 ArduinoJson: change log
 =======================
 
+HEAD
+----
+
+* Fixed `serialized()` not working with Flash strings (issue #1030)
+
 v6.11.0 (2019-05-26)
 -------
 
diff --git a/src/ArduinoJson/Strings/SizedFlashStringAdapter.hpp b/src/ArduinoJson/Strings/SizedFlashStringAdapter.hpp
index 0bddf4aa..323078af 100644
--- a/src/ArduinoJson/Strings/SizedFlashStringAdapter.hpp
+++ b/src/ArduinoJson/Strings/SizedFlashStringAdapter.hpp
@@ -29,7 +29,7 @@ class SizedFlashStringAdapter {
   char* save(MemoryPool* pool) const {
     if (!_str) return NULL;
     char* dup = pool->allocFrozenString(_size);
-    if (!dup) memcpy_P(dup, (const char*)_str, _size);
+    if (dup) memcpy_P(dup, (const char*)_str, _size);
     return dup;
   }