diff --git a/stepmania/src/Actor.cpp b/stepmania/src/Actor.cpp
index ae28356b12..177a518b03 100644
--- a/stepmania/src/Actor.cpp
+++ b/stepmania/src/Actor.cpp
@@ -840,7 +840,7 @@ void Actor::SetEffectPeriod( float fTime )
 	m_fEffectHoldAtZero = 0;
 }
 
-float Actor::GetEffectPeriod()
+float Actor::GetEffectPeriod() const
 {
 	return m_fEffectRampUp + m_fEffectHoldAtHalf + m_fEffectRampDown + m_fEffectHoldAtZero;
 }
@@ -1168,7 +1168,7 @@ void Actor::AddCommand( const RString &sCmdName, apActorCommands apac )
 	}
 }
 
-bool Actor::HasCommand( const RString &sCmdName )
+bool Actor::HasCommand( const RString &sCmdName ) const
 {
 	return GetCommand(sCmdName) != NULL;
 }
diff --git a/stepmania/src/Actor.h b/stepmania/src/Actor.h
index 861c915542..e69517d012 100644
--- a/stepmania/src/Actor.h
+++ b/stepmania/src/Actor.h
@@ -271,7 +271,7 @@ public:
 	void SetEffectColor1( RageColor c )		{ m_effectColor1 = c; }
 	void SetEffectColor2( RageColor c )		{ m_effectColor2 = c; }
 	void SetEffectPeriod( float fTime );
-	float GetEffectPeriod();
+	float GetEffectPeriod() const;
 	void SetEffectTiming( float fRampUp, float fAtHalf, float fRampDown, float fAtZero );
 	void SetEffectOffset( float fTime )		{ m_fEffectOffset = fTime; }
 	void SetEffectClock( EffectClock c )		{ m_EffectClock = c; }
@@ -355,7 +355,7 @@ public:
 	// Named commands
 	//
 	void AddCommand( const RString &sCmdName, apActorCommands apac );
-	bool HasCommand( const RString &sCmdName );
+	bool HasCommand( const RString &sCmdName ) const;
 	const apActorCommands *GetCommand( const RString &sCommandName ) const;
 	void PlayCommand( const RString &sCommandName ) { HandleMessage( Message(sCommandName) ); } // convenience
 	void PlayCommandNoRecurse( const Message &msg );