Spelling (#703)

diff --git a/include/json/value.h b/include/json/value.h
index 2e53314..be40c30 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -116,7 +116,7 @@
 
 /** \brief Lightweight wrapper to tag static string.
  *
- * Value constructor and objectValue member assignement takes advantage of the
+ * Value constructor and objectValue member assignment takes advantage of the
  * StaticString and avoid the cost of string duplication when storing the
  * string or the member name.
  *