diff --git a/source/blender/editors/transform/transform_snap_object.cc b/source/blender/editors/transform/transform_snap_object.cc
index 5ee6ff4d218..a32f23db0b9 100644
--- a/source/blender/editors/transform/transform_snap_object.cc
+++ b/source/blender/editors/transform/transform_snap_object.cc
@@ -1269,9 +1269,13 @@ eSnapMode ED_transform_snap_object_project_view3d_ex(SnapObjectContext *sctx,
 {
   eSnapMode retval = SCE_SNAP_TO_NONE;
   float ray_depth_max = BVH_RAYCAST_DIST_MAX;
+  bool use_occlusion_plane = false;
 
-  const bool is_allways_occluded = !params->use_occlusion_test;
-  bool use_occlusion_plane = is_allways_occluded || !XRAY_ENABLED(v3d);
+  /* It is required `mval` to calculate the occlusion plane. */
+  if (mval) {
+    const bool is_allways_occluded = !params->use_occlusion_test;
+    use_occlusion_plane = is_allways_occluded || !XRAY_ENABLED(v3d);
+  }
 
   if (use_occlusion_plane || (snap_to_flag & SCE_SNAP_TO_FACE)) {
     const RegionView3D *rv3d = static_cast<const RegionView3D *>(region->regiondata);