diff --git a/public/tier1/convar.h b/public/tier1/convar.h
index 7b884e09..14a6b546 100644
--- a/public/tier1/convar.h
+++ b/public/tier1/convar.h
@@ -379,7 +379,7 @@ private:
 	// Called by CCvar when the value of a var is changing.
 	virtual void				InternalSetValue(const char *value);
 	// For CVARs marked FCVAR_NEVER_AS_STRING
-	virtual void				InternalSetFloatValue( float fNewValue );
+	virtual void				InternalSetFloatValue( float fNewValue, bool bForce = false );
 	virtual void				InternalSetIntValue( int nValue );
 
 	virtual bool				ClampValue( float& value );
@@ -416,6 +416,13 @@ private:
 	float						m_fMinVal;
 	bool						m_bHasMax;
 	float						m_fMaxVal;
+
+	bool						m_bHasCompMin;
+	float						m_fCompMinVal;
+	bool						m_bHasCompMax;
+	float						m_fCompMaxVal;
+	bool						m_bCompetitiveRestrictions;
+
 	
 	// Call this function when ConVar changes
 	FnChangeCallback_t			m_fnChangeCallback;
diff --git a/tier1/convar.cpp b/tier1/convar.cpp
index 9011dbc7..fe6f09d1 100644
--- a/tier1/convar.cpp
+++ b/tier1/convar.cpp
@@ -862,9 +862,9 @@ bool ConVar::ClampValue( float& value )
 // Purpose: 
 // Input  : *value - 
 //-----------------------------------------------------------------------------
-void ConVar::InternalSetFloatValue( float fNewValue )
+void ConVar::InternalSetFloatValue( float fNewValue, bool bForce /*= false */ )
 {
-	if ( fNewValue == m_fValue )
+	if ( fNewValue == m_fValue && !bForce )
 		return;
 
 	if ( IsFlagSet( FCVAR_MATERIAL_THREAD_MASK ) )
@@ -961,6 +961,14 @@ void ConVar::Create( const char *pName, const char *pDefaultValue, int flags /*=
 	m_fMinVal = fMin;
 	m_bHasMax = bMax;
 	m_fMaxVal = fMax;
+
+	// AM stubbed out just enough for ABI compat
+	m_bHasCompMin = false;
+	m_fCompMinVal = 0.0;
+	m_bHasCompMax = false;
+	m_fCompMaxVal = 0.0;
+	m_bCompetitiveRestrictions = false;
+	//
 	
 	m_fnChangeCallback = callback;