diff --git a/Applications/Spreadsheet/CellType/Numeric.cpp b/Applications/Spreadsheet/CellType/Numeric.cpp
index 16cdbad58d3..ca283bd11e0 100644
--- a/Applications/Spreadsheet/CellType/Numeric.cpp
+++ b/Applications/Spreadsheet/CellType/Numeric.cpp
@@ -44,7 +44,7 @@ String NumericCell::display(Cell& cell, const CellTypeMetadata& metadata) const
 {
     auto value = js_value(cell, metadata);
     String string;
-    if (metadata.format.is_null())
+    if (metadata.format.is_empty())
         string = value.to_string_without_side_effects();
     else
         string = format_double(metadata.format.characters(), value.to_double(cell.sheet->interpreter()));
diff --git a/Applications/Spreadsheet/CellTypeDialog.cpp b/Applications/Spreadsheet/CellTypeDialog.cpp
index 0466f8427ea..77e3d038e15 100644
--- a/Applications/Spreadsheet/CellTypeDialog.cpp
+++ b/Applications/Spreadsheet/CellTypeDialog.cpp
@@ -198,9 +198,9 @@ void CellTypeDialog::setup_tabs(GUI::TabWidget& tabs, const Vector<Position>& po
         {
             auto& checkbox = right_side.add<GUI::CheckBox>("Override display format");
             auto& editor = right_side.add<GUI::TextEditor>();
-            checkbox.set_checked(!m_format.is_null());
+            checkbox.set_checked(!m_format.is_empty());
             editor.set_should_hide_unnecessary_scrollbars(true);
-            editor.set_enabled(!m_format.is_null());
+            editor.set_enabled(!m_format.is_empty());
             editor.set_text(m_format);
 
             checkbox.set_preferred_size(0, 20);