diff --git a/Doc/library/wave.rst b/Doc/library/wave.rst
index c85e2d7a150a3e..9423c68e316741 100644
--- a/Doc/library/wave.rst
+++ b/Doc/library/wave.rst
@@ -281,6 +281,8 @@ Wave_write Objects
       When setting :data:`WAVE_FORMAT_IEEE_FLOAT`, the sample width must be
       4 or 8 bytes.
 
+      .. versionadded:: 3.15
+
 
    .. method:: getformat()