diff --git a/Userland/Applications/Spreadsheet/JSIntegration.cpp b/Userland/Applications/Spreadsheet/JSIntegration.cpp
index 37fb98db489..4eb3dd90c47 100644
--- a/Userland/Applications/Spreadsheet/JSIntegration.cpp
+++ b/Userland/Applications/Spreadsheet/JSIntegration.cpp
@@ -16,6 +16,9 @@
 
 namespace Spreadsheet {
 
+JS_DEFINE_ALLOCATOR(SheetGlobalObject);
+JS_DEFINE_ALLOCATOR(WorkbookObject);
+
 Optional<FunctionAndArgumentIndex> get_function_and_argument_index(StringView source)
 {
     JS::Lexer lexer { source };
diff --git a/Userland/Applications/Spreadsheet/JSIntegration.h b/Userland/Applications/Spreadsheet/JSIntegration.h
index d52922c39f4..6aed6f0a1bf 100644
--- a/Userland/Applications/Spreadsheet/JSIntegration.h
+++ b/Userland/Applications/Spreadsheet/JSIntegration.h
@@ -21,6 +21,7 @@ Optional<FunctionAndArgumentIndex> get_function_and_argument_index(StringView so
 
 class SheetGlobalObject final : public JS::GlobalObject {
     JS_OBJECT(SheetGlobalObject, JS::GlobalObject);
+    JS_DECLARE_ALLOCATOR(SheetGlobalObject);
 
 public:
     SheetGlobalObject(JS::Realm&, Sheet&);
@@ -47,6 +48,7 @@ private:
 
 class WorkbookObject final : public JS::Object {
     JS_OBJECT(WorkbookObject, JS::Object);
+    JS_DECLARE_ALLOCATOR(WorkbookObject);
 
 public:
     WorkbookObject(JS::Realm&, Workbook&);