diff --git a/src/ObjLoading/Game/T6/XModel/JsonXModelLoader.cpp b/src/ObjLoading/Game/T6/XModel/JsonXModelLoader.cpp
index aad41974..b399fcb8 100644
--- a/src/ObjLoading/Game/T6/XModel/JsonXModelLoader.cpp
+++ b/src/ObjLoading/Game/T6/XModel/JsonXModelLoader.cpp
@@ -501,7 +501,7 @@ namespace
             const auto rigidBoneIndexForTri = GetRigidBoneIndicesForTris(vertexIndices, surface, common);
 
             std::vector<size_t> triSortList(surface.triCount);
-            std::ranges::iota(triSortList, 0);
+            std::iota(triSortList.begin(), triSortList.end(), 0);
 
             std::ranges::sort(triSortList,
                               [&rigidBoneIndexForTri](const size_t triIndex0, const size_t triIndex1)
@@ -593,7 +593,7 @@ namespace
 
             const auto vertexCount = vertexIndices.size();
             std::vector<size_t> reorderLookup(vertexCount);
-            std::ranges::iota(reorderLookup, 0);
+            std::iota(reorderLookup.begin(), reorderLookup.end(), 0);
 
             std::ranges::sort(reorderLookup,
                               [&common, &vertexIndices](const size_t& i0, const size_t& i1)
diff --git a/src/ObjLoading/XModel/Tangentspace.h b/src/ObjLoading/XModel/Tangentspace.h
index b4645c00..f0158bb4 100644
--- a/src/ObjLoading/XModel/Tangentspace.h
+++ b/src/ObjLoading/XModel/Tangentspace.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <cstdint>
+#include <cstdlib>
 
 namespace tangent_space
 {