1 files changed, 2 insertions, 2 deletions
diff --git a/src/ui/tools/box3d-tool.cpp b/src/ui/tools/box3d-tool.cpp
index 9b5b264bc..94488a700 100644
--- a/src/ui/tools/box3d-tool.cpp
+++ b/src/ui/tools/box3d-tool.cpp
@@ -109,8 +109,8 @@ static void sp_box3d_context_ensure_persp_in_defs(SPDocument *document) {
     SPDefs *defs = document->getDefs();
 
     bool has_persp = false;
-    for ( SPObject *child = defs->firstChild(); child; child = child->getNext() ) {
-        if (SP_IS_PERSP3D(child)) {
+    for (auto& child: defs->children) {
+        if (SP_IS_PERSP3D(&child)) {
             has_persp = true;
             break;
         }