diff --git a/toonz/sources/include/tnzsound.h b/toonz/sources/include/tnzsound.h
index b4cd04b..116deac 100644
--- a/toonz/sources/include/tnzsound.h
+++ b/toonz/sources/include/tnzsound.h
@@ -16,8 +16,5 @@
 #endif
 
 DVAPI void initSoundIo();
-DVAPI void mammaChePaura();
-
-DVAPI void cribbioNonCapiscoNulla();
 
 #endif
diff --git a/toonz/sources/sound/tsio.cpp b/toonz/sources/sound/tsio.cpp
index 56abaac..9c48f8a 100644
--- a/toonz/sources/sound/tsio.cpp
+++ b/toonz/sources/sound/tsio.cpp
@@ -8,10 +8,6 @@
 
 // static TPluginInfo info("soundIOPlugin");
 
-void cribbioNonCapiscoNulla() {}
-
-void mammaChePaura() {}
-
 void initSoundIo() {
   TSoundTrackReader::define("wav", TSoundTrackReaderWav::create);
   TSoundTrackWriter::define("wav", TSoundTrackWriterWav::create);