diff --git a/include/xlnt/worksheet/cell_vector.hpp b/include/xlnt/worksheet/cell_vector.hpp
index 87bdf40a..694bfc27 100644
--- a/include/xlnt/worksheet/cell_vector.hpp
+++ b/include/xlnt/worksheet/cell_vector.hpp
@@ -176,6 +176,11 @@ public:
     /// </summary>
     const cell operator[](std::size_t column_index) const;
 
+    /// <summary>
+    /// Returns true if this sheet has an initialized cell at the given cell_index.
+    /// </summary>
+    bool has_cell(std::size_t cell_index) const;
+
 private:
     /// <summary>
     /// The worksheet this vector points to cells from
diff --git a/source/utils/time.cpp b/source/utils/time.cpp
index 89ec8914..6d0f3220 100644
--- a/source/utils/time.cpp
+++ b/source/utils/time.cpp
@@ -22,6 +22,7 @@
 // @author: see AUTHORS file
 #include <cmath>
 #include <ctime>
+#include <cstdint>
 
 #include <xlnt/utils/time.hpp>
 
diff --git a/source/utils/timedelta.cpp b/source/utils/timedelta.cpp
index a263e685..ef065efd 100644
--- a/source/utils/timedelta.cpp
+++ b/source/utils/timedelta.cpp
@@ -22,6 +22,7 @@
 // @author: see AUTHORS file
 #include <cmath>
 #include <ctime>
+#include <cstdint>
 
 #include <xlnt/utils/timedelta.hpp>
 
diff --git a/source/workbook/workbook.cpp b/source/workbook/workbook.cpp
index dce9d3bd..1f167960 100644
--- a/source/workbook/workbook.cpp
+++ b/source/workbook/workbook.cpp
@@ -28,6 +28,8 @@
 #include <functional>
 #include <set>
 
+#include <codecvt>
+
 #include <xlnt/cell/cell.hpp>
 #include <xlnt/packaging/manifest.hpp>
 #include <xlnt/packaging/relationship.hpp>
diff --git a/source/worksheet/cell_vector.cpp b/source/worksheet/cell_vector.cpp
index 0d6162cf..12dd843c 100644
--- a/source/worksheet/cell_vector.cpp
+++ b/source/worksheet/cell_vector.cpp
@@ -171,4 +171,9 @@ const cell cell_vector::operator[](std::size_t cell_index) const
     return ws_.cell(cursor_.make_offset(0, static_cast<int>(cell_index)));
 }
 
+bool cell_vector::has_cell(std::size_t cell_index) const
+{
+    return ws_.has_cell(cursor_.make_offset(0, static_cast<int>(cell_index)));
+}
+
 } // namespace xlnt