diff --git a/BizHawk.Emulation/Interfaces/IEmulator.cs b/BizHawk.Emulation/Interfaces/IEmulator.cs
index 391f2c986e..d2365fcc41 100644
--- a/BizHawk.Emulation/Interfaces/IEmulator.cs
+++ b/BizHawk.Emulation/Interfaces/IEmulator.cs
@@ -14,7 +14,7 @@ namespace BizHawk
 
 		// note that most cores expect you to call SoundProvider.GetSamples() after each FrameAdvance()
 		// please do this, even when rendersound = false
-		void FrameAdvance(bool render, bool rendersound);
+		void FrameAdvance(bool render, bool rendersound = true);
 
 		int Frame { get; }
 		int LagCount { get; set; }
diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index 76efd7efa0..3278c9f3ba 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -1999,7 +1999,7 @@ namespace BizHawk.MultiClient
 
 			if (Global.Config.SkipLagFrame && Global.Emulator.IsLagFrame && frameProgressTimeElapsed)
 			{
-				Global.Emulator.FrameAdvance(true, true);
+				Global.Emulator.FrameAdvance(true);
 			}
 
 			if (Global.ClientControls["Frame Advance"] || PressFrameAdvance)
@@ -2116,7 +2116,7 @@ namespace BizHawk.MultiClient
 
 				//=======================================
 				MemoryPulse.Pulse();
-				Global.Emulator.FrameAdvance(!throttle.skipnextframe, true);
+				Global.Emulator.FrameAdvance(!throttle.skipnextframe);
 				MemoryPulse.Pulse();
 				//=======================================
 				if (CurrAviWriter != null)
@@ -3278,7 +3278,7 @@ namespace BizHawk.MultiClient
 				for (int j = 0; j < frameskip; j++)
 				{
 					StepRunLoop_Core();
-					Global.Emulator.FrameAdvance(true, true); //Frame advance
+					Global.Emulator.FrameAdvance(true); //Frame advance
 					//Global.RenderPanel.Render(Global.Emulator.VideoProvider);
 
 					if (gifSpeed > 0)