diff --git a/aegisub/src/spline_curve.cpp b/aegisub/src/spline_curve.cpp
index 732ec1451..a9e206425 100644
--- a/aegisub/src/spline_curve.cpp
+++ b/aegisub/src/spline_curve.cpp
@@ -51,10 +51,12 @@ SplineCurve::SplineCurve(Vector2D p1, Vector2D p2, Vector2D p3, Vector2D p4)
 {
 }
 
-void SplineCurve::Split(SplineCurve &c1, SplineCurve &c2, float t) {
+std::pair<SplineCurve, SplineCurve> SplineCurve::Split(float t) {
 	if (type == LINE) {
-		c1 = SplineCurve(p1, p1 * (1 - t) + p2 * t);
-		c2 = SplineCurve(c1.p2, p2);
+		Vector2D m = p1 * (1 - t) + p2 * t;
+		return std::make_pair(
+			SplineCurve(p1, m),
+			SplineCurve(m, p2));
 	}
 	else if (type == BICUBIC) {
 		float u = 1 - t;
@@ -65,9 +67,11 @@ void SplineCurve::Split(SplineCurve &c1, SplineCurve &c2, float t) {
 		Vector2D p234  = p23  * u + p34  * t;
 		Vector2D p1234 = p123 * u + p234 * t;
 
-		c1 = SplineCurve(p1, p12, p123, p1234);
-		c2 = SplineCurve(p1234, p234, p34, p4);
+		return std::make_pair(
+			SplineCurve(p1, p12, p123, p1234),
+			SplineCurve(p1234, p234, p34, p4));
 	}
+	return std::make_pair(SplineCurve(p1), SplineCurve(p1));
 }
 
 void SplineCurve::Smooth(Vector2D p0, Vector2D p3, float smooth) {
diff --git a/aegisub/src/spline_curve.h b/aegisub/src/spline_curve.h
index 99f60acf0..42a5c0140 100644
--- a/aegisub/src/spline_curve.h
+++ b/aegisub/src/spline_curve.h
@@ -67,10 +67,9 @@ public:
 	SplineCurve(Vector2D p1, Vector2D p2, Vector2D p3, Vector2D p4);
 
 	/// @brief Split a curve in two using the de Casteljau algorithm
-	/// @param[out] c1 Curve before split point
-	/// @param[out] c2 Curve after split point
-	/// @param t Split point
-	void Split(SplineCurve &c1, SplineCurve &c2, float t = 0.5f);
+	/// @param t Split point from 0-1
+	/// @return Curve before and after the split point
+	std::pair<SplineCurve, SplineCurve> Split(float t = 0.5f);
 
 	/// @brief Smooths the curve
 	/// @note Based on http://antigrain.com/research/bezier_interpolation/index.html
diff --git a/aegisub/src/visual_tool_vector_clip.cpp b/aegisub/src/visual_tool_vector_clip.cpp
index 2147e5de6..5a71908f0 100644
--- a/aegisub/src/visual_tool_vector_clip.cpp
+++ b/aegisub/src/visual_tool_vector_clip.cpp
@@ -289,9 +289,9 @@ bool VisualToolVectorClip::InitializeHold() {
 				spline.push_back(ct);
 			}
 			else {
-				SplineCurve c2;
-				curve->Split(*curve, c2, t);
-				spline.insert(++curve, c2);
+				std::pair<SplineCurve, SplineCurve> split = curve->Split(t);
+				*curve = split.first;
+				spline.insert(++curve, split.second);
 			}
 		}