diff --git a/Source/Core/DolphinQt2/Debugger/RegisterWidget.cpp b/Source/Core/DolphinQt2/Debugger/RegisterWidget.cpp
index 9fd01350e9..8b6fa48bfb 100644
--- a/Source/Core/DolphinQt2/Debugger/RegisterWidget.cpp
+++ b/Source/Core/DolphinQt2/Debugger/RegisterWidget.cpp
@@ -323,7 +323,7 @@ void RegisterWidget::PopulateTable()
 }
 
 void RegisterWidget::AddRegister(int row, int column, RegisterType type, std::string register_name,
-                                 std::function<u32()> get_reg, std::function<void(u32)> set_reg)
+                                 std::function<u64()> get_reg, std::function<void(u64)> set_reg)
 {
   auto* value = new RegisterColumn(type, get_reg, set_reg);
 
diff --git a/Source/Core/DolphinQt2/Debugger/RegisterWidget.h b/Source/Core/DolphinQt2/Debugger/RegisterWidget.h
index f5c1a4c1a1..795550505e 100644
--- a/Source/Core/DolphinQt2/Debugger/RegisterWidget.h
+++ b/Source/Core/DolphinQt2/Debugger/RegisterWidget.h
@@ -40,7 +40,7 @@ private:
   void OnItemChanged(QTableWidgetItem* item);
 
   void AddRegister(int row, int column, RegisterType type, std::string register_name,
-                   std::function<u32()> get_reg, std::function<void(u32)> set_reg);
+                   std::function<u64()> get_reg, std::function<void(u64)> set_reg);
 
   QTableWidget* m_table;
   bool m_updating = false;