diff --git a/source/detail/implementations/workbook_impl.hpp b/source/detail/implementations/workbook_impl.hpp
index 92a64a82..7c4e028f 100644
--- a/source/detail/implementations/workbook_impl.hpp
+++ b/source/detail/implementations/workbook_impl.hpp
@@ -144,9 +144,13 @@ struct workbook_impl
     struct file_version_t
     {
         std::string app_name;
-        std::size_t last_edited = 0;
-        std::size_t lowest_edited = 0;
-        std::size_t rup_build = 0;
+        std::size_t last_edited;
+        std::size_t lowest_edited;
+        std::size_t rup_build;
+
+        file_version_t(): last_edited(0), lowest_edited(0), rup_build(0) {
+
+        }
 
         bool operator==(const file_version_t& rhs) const
         {
diff --git a/source/workbook/workbook.cpp b/source/workbook/workbook.cpp
index fcdb6a13..ff96a72e 100644
--- a/source/workbook/workbook.cpp
+++ b/source/workbook/workbook.cpp
@@ -414,7 +414,11 @@ workbook workbook::empty()
     wb.extended_property(xlnt::extended_property::hyperlinks_changed, false);
     wb.extended_property(xlnt::extended_property::app_version, "15.0300");
 
-    auto file_version = detail::workbook_impl::file_version_t{"xl", 6, 6, 26709};
+    detail::workbook_impl::file_version_t file_version;
+    file_version.app_name = "xl";
+    file_version.last_edited = 6;
+    file_version.lowest_edited = 6;
+    file_version.rup_build = 26709;
     wb.d_->file_version_ = file_version;
 
     xlnt::workbook_view wb_view;