diff --git a/include/xlnt/reader/workbook_reader.hpp b/include/xlnt/reader/workbook_reader.hpp
index 123a4c5d..2cfb162c 100644
--- a/include/xlnt/reader/workbook_reader.hpp
+++ b/include/xlnt/reader/workbook_reader.hpp
@@ -23,6 +23,7 @@
 // @author: see AUTHORS file
 #pragma once
 
+#include <cstdint>
 #include <vector>
 
 namespace xlnt {
diff --git a/include/xlnt/styles/borders.hpp b/include/xlnt/styles/borders.hpp
index 6bddd873..5f5692e5 100644
--- a/include/xlnt/styles/borders.hpp
+++ b/include/xlnt/styles/borders.hpp
@@ -94,7 +94,7 @@ public:
     bool diagonal_up;
     bool diagonal_down;
     
-    diagonal_direction diagonal_direction;
+    diagonal_direction diagonal_direction_;
     
     bool operator==(const border &other) const
     {
diff --git a/source/cell.cpp b/source/cell.cpp
index 4c6e51eb..fab54db1 100644
--- a/source/cell.cpp
+++ b/source/cell.cpp
@@ -490,7 +490,7 @@ void cell::set_value(unsigned long i)
 }
 #endif
 
-#ifdef __linux__
+#ifdef __linux
 template<>
 void cell::set_value(long long i)
 {
@@ -985,7 +985,15 @@ std::uint64_t cell::get_value() const
 {
     return static_cast<std::uint64_t>(d_->value_numeric_);
 }
-    
+
+#ifdef __linux
+template<>
+long long int cell::get_value() const
+{
+    return static_cast<long long int>(d_->value_numeric_);
+}
+#endif
+
 template<>
 float cell::get_value() const
 {
diff --git a/source/worksheet_writer.cpp b/source/worksheet_writer.cpp
index 4793574c..9529a302 100644
--- a/source/worksheet_writer.cpp
+++ b/source/worksheet_writer.cpp
@@ -253,7 +253,7 @@ std::string write_worksheet(worksheet ws, const std::vector<std::string> &string
                             else
                             {
                                 std::stringstream ss;
-                                ss.precision(17);
+                                ss.precision(20);
                                 ss << cell.get_value<long double>();
                                 ss.str();
                                 value_node.text().set(ss.str().c_str());