diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4a72062..d9ff86d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ HEAD
 ----
 
 * Fixed "maybe-uninitialized" warning (issue #1217)
+* Fixed "statement is unreachable" warning on IAR (issue #1233)
 
 v6.15.0 (2020-03-22)
 -------
diff --git a/src/ArduinoJson/Variant/SlotFunctions.hpp b/src/ArduinoJson/Variant/SlotFunctions.hpp
index ef75a94d..b96b58e4 100644
--- a/src/ArduinoJson/Variant/SlotFunctions.hpp
+++ b/src/ArduinoJson/Variant/SlotFunctions.hpp
@@ -24,7 +24,6 @@ inline bool slotSetKey(VariantSlot* var, TAdaptedString key, MemoryPool* pool,
   } else {
     return slotSetKey(var, key, pool, storage_policy::store_by_copy());
   }
-  return true;
 }
 
 template <typename TAdaptedString>