diff --git a/src/libnest2d/include/libnest2d/libnest2d.hpp b/src/libnest2d/include/libnest2d/libnest2d.hpp
index 104445a289..3d0c6f9a4c 100644
--- a/src/libnest2d/include/libnest2d/libnest2d.hpp
+++ b/src/libnest2d/include/libnest2d/libnest2d.hpp
@@ -647,8 +647,7 @@ public:
      * This method makes possible to "preload" some items into the placer. It
      * will not move these items but will consider them as already packed.
      */
-    template<class Range = ConstItemRange<DefaultIterator>>
-    inline void preload(const Range& packeditems = Range())
+    inline void preload(const ItemGroup& packeditems)
     {
         impl_.preload(packeditems);
     }
diff --git a/src/libnest2d/include/libnest2d/placers/placer_boilerplate.hpp b/src/libnest2d/include/libnest2d/placers/placer_boilerplate.hpp
index ef5056910d..309a5007de 100644
--- a/src/libnest2d/include/libnest2d/placers/placer_boilerplate.hpp
+++ b/src/libnest2d/include/libnest2d/placers/placer_boilerplate.hpp
@@ -60,8 +60,7 @@ public:
     }
 
     template<class Range = ConstItemRange<DefaultIter>>
-    bool pack(Item& item,
-              const Range& rem = Range()) {
+    bool pack(Item& item, const Range& rem = Range()) {
         auto&& r = static_cast<Subclass*>(this)->trypack(item, rem);
         if(r) {
             items_.push_back(*(r.item_ptr_));
@@ -70,9 +69,8 @@ public:
         return r;
     }
 
-    template<class Range = ConstItemRange<DefaultIter>>
-    void preload(const Range& packeditems = Range()) {
-        items_.insert(items_.end(), packeditems.from, packeditems.to);
+    void preload(const ItemGroup& packeditems) {
+        items_.insert(items_.end(), packeditems.begin(), packeditems.end());
         farea_valid_ = false;
     }
 
diff --git a/src/libnest2d/include/libnest2d/selections/firstfit.hpp b/src/libnest2d/include/libnest2d/selections/firstfit.hpp
index 25fb73590f..d521673b44 100644
--- a/src/libnest2d/include/libnest2d/selections/firstfit.hpp
+++ b/src/libnest2d/include/libnest2d/selections/firstfit.hpp
@@ -46,7 +46,7 @@ public:
         for(ItemGroup& ig : packed_bins_) {
             placers.emplace_back(bin);
             placers.back().configure(pconfig);
-            placers.back().preload({ig.begin(), ig.end()});
+            placers.back().preload(ig);
         }
 
         std::copy(first, last, std::back_inserter(store_));