diff --git a/src/calibre/utils/tts/piper.cpp b/src/calibre/utils/tts/piper.cpp
index 75fb98bd27..c5851b7343 100644
--- a/src/calibre/utils/tts/piper.cpp
+++ b/src/calibre/utils/tts/piper.cpp
@@ -57,6 +57,7 @@ static float current_length_scale = 1;
 static float current_noise_scale = 1;
 static float current_noise_w  = 1;
 static float current_sentence_delay  = 0;
+static bool current_normalize_volume = true;
 std::unique_ptr<Ort::Session> session;
 std::queue<std::vector<PhonemeId>> phoneme_id_queue;
 std::vector<float> chunk_samples;
@@ -231,6 +232,7 @@ set_voice(PyObject *self, PyObject *args) {
     G(noise_scale, current_noise_scale, (float)PyFloat_AsDouble);
     G(noise_w, current_noise_w, (float)PyFloat_AsDouble);
     G(sentence_delay, current_sentence_delay, (float)PyFloat_AsDouble);
+    G(normalize_volume, current_normalize_volume, PyObject_IsTrue);
 #undef G
 
     PyObject *map = PyObject_GetAttrString(cfg, "phoneme_id_map");
diff --git a/src/calibre/utils/tts/piper.py b/src/calibre/utils/tts/piper.py
index 74291238c8..26d1fd2276 100644
--- a/src/calibre/utils/tts/piper.py
+++ b/src/calibre/utils/tts/piper.py
@@ -28,6 +28,7 @@ class VoiceConfig(NamedTuple):
     noise_w: float
     num_speakers: int
     sentence_delay: float = 0
+    normalize_volume: bool = False
 
 
 def translate_voice_config(x: Any) -> VoiceConfig: