diff --git a/public/globalvars_base.h b/public/globalvars_base.h
index 1ae8c727..2e1f90e3 100644
--- a/public/globalvars_base.h
+++ b/public/globalvars_base.h
@@ -37,6 +37,7 @@ public:
 	int				framecount;
 	// Non-paused frametime
 	float			absoluteframetime;
+        float			absoluteframestarttimestddev;
 
 	// Current time 
 	//
diff --git a/public/inetchannel.h b/public/inetchannel.h
index 76db6ceb..f8784826 100644
--- a/public/inetchannel.h
+++ b/public/inetchannel.h
@@ -97,7 +97,7 @@ public:
 
 	virtual bool	IsNull() const = 0;
 	virtual void	SetInterpolationAmount( float flInterpolationAmount ) = 0;
-	virtual void	SetRemoteFramerate( float flFrameTime, float flFrameTimeStdDeviation ) = 0;
+	virtual void	SetRemoteFramerate( float flFrameTime, float flFrameTimeStdDeviation, float flFrameStartTimeStdDeviation ) = 0;
 
 	// Max # of payload bytes before we must split/fragment the packet
 	virtual void	SetMaxRoutablePayloadSize( int nSplitSize ) = 0;
diff --git a/public/inetchannelinfo.h b/public/inetchannelinfo.h
index 2aa72c86..a38d0cf6 100644
--- a/public/inetchannelinfo.h
+++ b/public/inetchannelinfo.h
@@ -70,7 +70,7 @@ public:
 	virtual float		GetTimeSinceLastReceived( void ) const = 0;	// get time since last recieved packet in seconds
 	virtual	float		GetCommandInterpolationAmount( int flow, int frame_number ) const = 0;
 	virtual void		GetPacketResponseLatency( int flow, int frame_number, int *pnLatencyMsecs, int *pnChoke ) const = 0;
-	virtual void		GetRemoteFramerate( float *pflFrameTime, float *pflFrameTimeStdDeviation ) const = 0;
+	virtual void		GetRemoteFramerate( float *pflFrameTime, float *pflFrameTimeStdDeviation, float *pflFrameStartTimeStdDeviation ) const = 0;
 
 	virtual float		GetTimeoutSeconds() const = 0;
 };