diff --git a/libctru/include/3ds/ndsp/ndsp.h b/libctru/include/3ds/ndsp/ndsp.h
index 188efe4..9673ccf 100644
--- a/libctru/include/3ds/ndsp/ndsp.h
+++ b/libctru/include/3ds/ndsp/ndsp.h
@@ -122,7 +122,7 @@ void ndspSetMasterVol(float volume);
  * @brief Gets the master volume.
  * @return The master volume.
  */
-void ndspGetMasterVol(void); 
+float ndspGetMasterVol(void); 
 
 /**
  * @brief Sets the output mode.