diff --git a/spine-cpp/spine-cpp/include/spine/IkConstraintTimeline.h b/spine-cpp/spine-cpp/include/spine/IkConstraintTimeline.h
index 3606da38a..e405b9476 100644
--- a/spine-cpp/spine-cpp/include/spine/IkConstraintTimeline.h
+++ b/spine-cpp/spine-cpp/include/spine/IkConstraintTimeline.h
@@ -35,6 +35,8 @@
 
 namespace spine {
 
+	/// Changes an IK constraint's IkConstraintPose::getMix(), IkConstraintPose::getSoftness(),
+	/// IkConstraintPose::getBendDirection(), IkConstraintPose::getStretch(), and IkConstraintPose::getCompress().
 	class SP_API IkConstraintTimeline : public CurveTimeline, public ConstraintTimeline {
 		friend class SkeletonBinary;
 
@@ -43,7 +45,7 @@ namespace spine {
 	RTTI_DECL
 
 	public:
-		explicit IkConstraintTimeline(size_t frameCount, size_t bezierCount, int ikConstraintIndex);
+		explicit IkConstraintTimeline(size_t frameCount, size_t bezierCount, int constraintIndex);
 
 		virtual ~IkConstraintTimeline();
 
diff --git a/spine-cpp/spine-cpp/src/spine/IkConstraintTimeline.cpp b/spine-cpp/spine-cpp/src/spine/IkConstraintTimeline.cpp
index 2d43458b4..b21709068 100644
--- a/spine-cpp/spine-cpp/src/spine/IkConstraintTimeline.cpp
+++ b/spine-cpp/spine-cpp/src/spine/IkConstraintTimeline.cpp
@@ -44,9 +44,9 @@ using namespace spine;
 
 RTTI_IMPL_MULTI(IkConstraintTimeline, CurveTimeline, ConstraintTimeline)
 
-IkConstraintTimeline::IkConstraintTimeline(size_t frameCount, size_t bezierCount, int ikConstraintIndex)
-	: CurveTimeline(frameCount, IkConstraintTimeline::ENTRIES, bezierCount), ConstraintTimeline(ikConstraintIndex) {
-	PropertyId ids[] = {((PropertyId) Property_IkConstraint << 32) | ikConstraintIndex};
+IkConstraintTimeline::IkConstraintTimeline(size_t frameCount, size_t bezierCount, int constraintIndex)
+	: CurveTimeline(frameCount, IkConstraintTimeline::ENTRIES, bezierCount), ConstraintTimeline(constraintIndex) {
+	PropertyId ids[] = {((PropertyId) Property_IkConstraint << 32) | constraintIndex};
 	setPropertyIds(ids, 1);
 }