diff --git a/stepmania/src/RageTypes.h b/stepmania/src/RageTypes.h
index 7997c0c8f8..333d14ec68 100644
--- a/stepmania/src/RageTypes.h
+++ b/stepmania/src/RageTypes.h
@@ -262,4 +262,6 @@ public:
 	float m[4][4];
 };
 
+RageColor scale( float x, float l1, float h1, const RageColor &a, const RageColor &b );
+
 #endif
diff --git a/stepmania/src/Sprite.cpp b/stepmania/src/Sprite.cpp
index d4b49b676f..050069e9bd 100644
--- a/stepmania/src/Sprite.cpp
+++ b/stepmania/src/Sprite.cpp
@@ -426,7 +426,8 @@ void Sprite::DrawTexture( const TweenState *state )
 	}
 }
 
-static RageColor scale( float x, float l1, float h1, const RageColor &a, const RageColor &b )
+/* XXX: move to RageTypes.cpp */
+RageColor scale( float x, float l1, float h1, const RageColor &a, const RageColor &b )
 {
 	return RageColor(
 		SCALE( x, l1, h1, a.r, b.r ),