diff --git a/v2_0_cpp_unpacker.md b/v2_0_cpp_unpacker.md
index bb7fb70..88d7f3b 100644
--- a/v2_0_cpp_unpacker.md
+++ b/v2_0_cpp_unpacker.md
@@ -179,13 +179,13 @@ void some_function(const char* buffer, std::size_t len) {
     std::size_t off = 0;
 
     // Unpack the first msgpack data.
-    // off is updated when function is retuened.
+    // off is updated when function is returned.
     unpack(result1, buffer, len, off);
     // Unpack the second msgpack data.
-    // off is updated when function is retuened.
+    // off is updated when function is returned.
     unpack(result2, buffer, len, off);
     // Unpack the third msgpack data.
-    // off is updated when function is retuened.
+    // off is updated when function is returned.
     unpack(result3, buffer, len, off);
     assert(len == off);
     ...