diff --git a/Core/include/Acts/Vertexing/AdaptiveMultiVertexFinder.hpp b/Core/include/Acts/Vertexing/AdaptiveMultiVertexFinder.hpp
index 7dbc7d7783a..8c2ca780850 100644
--- a/Core/include/Acts/Vertexing/AdaptiveMultiVertexFinder.hpp
+++ b/Core/include/Acts/Vertexing/AdaptiveMultiVertexFinder.hpp
@@ -112,9 +112,13 @@ class AdaptiveMultiVertexFinder final : public IVertexFinder {
     // Include also single track vertices
     bool addSingleTrackVertices = false;
 
-    // Use 3d information for evaluating the vertex distance significance
-    // for vertex merging/splitting
-    bool do3dSplitting = false;
+    // If doFullSplitting == true, we check the 3D distance (if useTime ==
+    // false) or the 4D distance (if useTime == true) of the vertices to
+    // determine whether they are merged.
+    // If doFullSplitting == false, we check the z distance (if useTime ==
+    // false) or the z-t distance (if useTime == true) of the vertices to
+    // determine whether they are merged.
+    bool doFullSplitting = false;
 
     // Maximum vertex contamination value
     double maximumVertexContamination = 0.5;
diff --git a/Core/src/Vertexing/AdaptiveMultiVertexFinder.cpp b/Core/src/Vertexing/AdaptiveMultiVertexFinder.cpp
index 9e6ac04f36b..f2d3835a989 100644
--- a/Core/src/Vertexing/AdaptiveMultiVertexFinder.cpp
+++ b/Core/src/Vertexing/AdaptiveMultiVertexFinder.cpp
@@ -504,7 +504,7 @@ bool AdaptiveMultiVertexFinder::isMergedVertex(
     const SquareMatrix4& otherCov = otherVtx->fullCovariance();
 
     double significance = 0;
-    if (!m_cfg.do3dSplitting) {
+    if (!m_cfg.doFullSplitting) {
       const double deltaZPos = otherPos[eZ] - candidatePos[eZ];
       const double sumVarZ = otherCov(eZ, eZ) + candidateCov(eZ, eZ);
       if (sumVarZ <= 0) {
diff --git a/Examples/Algorithms/Vertexing/src/AdaptiveMultiVertexFinderAlgorithm.cpp b/Examples/Algorithms/Vertexing/src/AdaptiveMultiVertexFinderAlgorithm.cpp
index 38e003576db..bba33aa436c 100644
--- a/Examples/Algorithms/Vertexing/src/AdaptiveMultiVertexFinderAlgorithm.cpp
+++ b/Examples/Algorithms/Vertexing/src/AdaptiveMultiVertexFinderAlgorithm.cpp
@@ -139,8 +139,7 @@ auto ActsExamples::AdaptiveMultiVertexFinderAlgorithm::makeVertexFinder() const
     // maximum chi2 that a track can have to be associated with a vertex).
     finderConfig.tracksMaxSignificance = 7.5;
     // Check if vertices are merged in space and time
-    // TODO rename do3dSplitting -> doFullSplitting
-    finderConfig.do3dSplitting = true;
+    finderConfig.doFullSplitting = true;
     // Reset the maximum significance that two vertices can have before they
     // are considered as merged. The default value 3 is tuned for comparing
     // the vertices' z-coordinates. Since we consider 4 dimensions here, we