diff --git a/include/xlnt/worksheet/pane.hpp b/include/xlnt/worksheet/pane.hpp
index 60f0c650d..f1e259420 100644
--- a/include/xlnt/worksheet/pane.hpp
+++ b/include/xlnt/worksheet/pane.hpp
@@ -53,6 +53,7 @@ enum class XLNT_API pane_corner
 
 /// <summary>
 /// A fixed portion of a worksheet.
+/// Implements section 3.3.1.64 of ECMA 376 - Worksheet view pane
 /// </summary>
 struct XLNT_API pane
 {
@@ -64,22 +65,22 @@ struct XLNT_API pane
     /// <summary>
     /// The state of the pane
     /// </summary>
-    pane_state state = pane_state::split;
+    optional<pane_state> state = pane_state::split;
 
     /// <summary>
     /// The pane which contains the active cell
     /// </summary>
-    pane_corner active_pane = pane_corner::top_left;
+    optional<pane_corner> active_pane = pane_corner::top_left;
 
     /// <summary>
     /// The row where the split should take place
     /// </summary>
-    row_t y_split = 1;
+    optional<double> y_split = 0.0;
 
     /// <summary>
     /// The column where the split should take place
     /// </summary>
-    column_t x_split = 1;
+    optional<double> x_split = 0.0;
 
     /// <summary>
     /// Returns true if this pane is equal to rhs based on its top-left cell, state,
diff --git a/source/detail/serialization/xlsx_producer.cpp b/source/detail/serialization/xlsx_producer.cpp
index 6f6e26ccc..35cdb8736 100644
--- a/source/detail/serialization/xlsx_producer.cpp
+++ b/source/detail/serialization/xlsx_producer.cpp
@@ -2399,25 +2399,31 @@ void xlsx_producer::write_worksheet(const relationship &rel)
             {
                 write_attribute("topLeftCell", current_pane.top_left_cell.get().to_string());
             }
-
-            if (current_pane.x_split + 1 == current_pane.top_left_cell.get().column())
+            
+            if (current_pane.x_split.is_set())
             {
-                write_attribute("xSplit", current_pane.x_split.index);
+                write_attribute("xSplit", current_pane.x_split.get());
             }
 
-            if (current_pane.y_split + 1 == current_pane.top_left_cell.get().row())
+            if (current_pane.x_split.is_set())
             {
-                write_attribute("ySplit", current_pane.y_split);
+                write_attribute("ySplit", current_pane.y_split.get());
             }
 
-            if (current_pane.active_pane != pane_corner::top_left)
+            if (current_pane.active_pane.is_set())
             {
-                write_attribute("activePane", current_pane.active_pane);
+                if (current_pane.active_pane.get() != pane_corner::top_left)
+                {
+                    write_attribute("activePane", current_pane.active_pane.get());
+                }
             }
 
-            if (current_pane.state != pane_state::split)
+            if (current_pane.state.is_set())
             {
-                write_attribute("state", current_pane.state);
+                if (current_pane.state.get() != pane_state::split)
+                {
+                    write_attribute("state", current_pane.state.get());
+                }
             }
 
             write_end_element(xmlns, "pane");