diff --git a/src/common/ref_resource_view.h b/src/common/ref_resource_view.h
index 0fadf846d..d4f82e615 100644
--- a/src/common/ref_resource_view.h
+++ b/src/common/ref_resource_view.h
@@ -76,7 +76,7 @@ class RefResourceView {
 
   [[nodiscard]] size_type size() const { return size_; }  // NOLINT
   [[nodiscard]] size_type size_bytes() const {            // NOLINT
-    return Span{data(), size()}.size_bytes();
+    return Span<const value_type>{data(), size()}.size_bytes();
   }
   [[nodiscard]] value_type* data() { return ptr_; };              // NOLINT
   [[nodiscard]] value_type const* data() const { return ptr_; };  // NOLINT
diff --git a/tests/cpp/common/test_io.cc b/tests/cpp/common/test_io.cc
index 8bc12698b..f8aa9fd73 100644
--- a/tests/cpp/common/test_io.cc
+++ b/tests/cpp/common/test_io.cc
@@ -148,7 +148,8 @@ TEST(IO, Resource) {
     fout << 1.0 << std::endl;
     fout.close();
 
-    auto resource = std::make_shared<MmapResource>(path, 0, sizeof(double));
+    auto resource = std::shared_ptr<MmapResource>{
+      new MmapResource{path, 0, sizeof(double)}};
     ASSERT_EQ(resource->Size(), sizeof(double));
     ASSERT_EQ(resource->Type(), ResourceHandler::kMmap);
     ASSERT_EQ(resource->DataAs<double>()[0], val);