diff --git a/src/audio/mockingboard.c b/src/audio/mockingboard.c
index 5c7cae91..f5429af2 100644
--- a/src/audio/mockingboard.c
+++ b/src/audio/mockingboard.c
@@ -1757,6 +1757,10 @@ void MB_Destroy()
         }
 }
 
+bool MB_ISEnabled(void) {
+    return (MockingboardVoice != NULL);
+}
+
 //-----------------------------------------------------------------------------
 
 static void ResetState()
diff --git a/src/audio/mockingboard.h b/src/audio/mockingboard.h
index 042b582f..3a810287 100644
--- a/src/audio/mockingboard.h
+++ b/src/audio/mockingboard.h
@@ -98,6 +98,7 @@ extern uint32_t	g_uTimer1IrqCount;	// DEBUG
 void	MB_Initialize();
 void	MB_Reinitialize();
 void	MB_Destroy();
+bool    MB_ISEnabled(void);
 void    MB_Reset();
 void    MB_InitializeIO(char *pCxRomPeripheral, unsigned int uSlot4, unsigned int uSlot5);
 void    MB_Mute();