diff --git a/Source/Core/DolphinQt/Config/Mapping/IOWindow.cpp b/Source/Core/DolphinQt/Config/Mapping/IOWindow.cpp
index 6bb14b9928..74b4ceaf11 100644
--- a/Source/Core/DolphinQt/Config/Mapping/IOWindow.cpp
+++ b/Source/Core/DolphinQt/Config/Mapping/IOWindow.cpp
@@ -771,7 +771,7 @@ void IOWindow::UpdateExpression(std::string new_expression, UpdateMode mode)
   m_controller->UpdateSingleControlReference(g_controller_interface, m_reference);
 
   // Emit signal that this IOWindow's expression changed.
-  emit OnMappingChange(QString::fromStdString(m_reference->GetExpression()));
+  emit OnMappingChange();
 
   // This is the only place where we need to update the user variables. Keep the first 4 items.
   while (m_variables_combo->count() > 4)
diff --git a/Source/Core/DolphinQt/Config/Mapping/IOWindow.h b/Source/Core/DolphinQt/Config/Mapping/IOWindow.h
index d75b2878d5..e719c5ad54 100644
--- a/Source/Core/DolphinQt/Config/Mapping/IOWindow.h
+++ b/Source/Core/DolphinQt/Config/Mapping/IOWindow.h
@@ -71,7 +71,7 @@ public:
 signals:
   void DetectInputComplete();
   void TestOutputComplete();
-  void OnMappingChange(const QString& expression);
+  void OnMappingChange();
 
 private:
   std::shared_ptr<ciface::Core::Device> GetSelectedDevice() const;
diff --git a/Source/Core/DolphinQt/Config/Mapping/MappingButton.cpp b/Source/Core/DolphinQt/Config/Mapping/MappingButton.cpp
index bc194fdcb8..e7ec598004 100644
--- a/Source/Core/DolphinQt/Config/Mapping/MappingButton.cpp
+++ b/Source/Core/DolphinQt/Config/Mapping/MappingButton.cpp
@@ -93,8 +93,8 @@ void MappingButton::AdvancedPressed()
   IOWindow io(m_mapping_window, m_mapping_window->GetController(), m_reference,
               m_reference->IsInput() ? IOWindow::Type::Input : IOWindow::Type::Output);
   
-  connect(&io, &IOWindow::OnMappingChange, m_mapping_window, [this](const QString& expr) {
-    m_mapping_window->OnMappingChange(1);
+  connect(&io, &IOWindow::OnMappingChange, m_mapping_window, [this] {
+    m_mapping_window->OnMappingChange();
   });
   
   io.exec();
diff --git a/Source/Core/DolphinQt/Config/Mapping/MappingCommon.cpp b/Source/Core/DolphinQt/Config/Mapping/MappingCommon.cpp
index 19c7e2e9c7..ba60b172f5 100644
--- a/Source/Core/DolphinQt/Config/Mapping/MappingCommon.cpp
+++ b/Source/Core/DolphinQt/Config/Mapping/MappingCommon.cpp
@@ -133,7 +133,7 @@ public:
     m_parent->GetController()->UpdateSingleControlReference(g_controller_interface,
                                                             control_reference);
     m_parent->GetController()->GetConfig()->GenerateControllerTextures();
-    m_parent->OnMappingChange(0);
+    m_parent->OnMappingChange();
   }
 
   void UpdateInputDetectionStartTimer()
diff --git a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp
index e14da5025a..ed4957d00a 100644
--- a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp
+++ b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp
@@ -663,7 +663,7 @@ void MappingWindow::ActivateExtensionTab()
   m_tab_widget->setCurrentIndex(3);
 }
 
-void MappingWindow::OnMappingChange(int source)
+void MappingWindow::OnMappingChange()
 {
   UpdateProfileButtonState();
 }
\ No newline at end of file
diff --git a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h
index 98771a47ca..d65fdb2bd0 100644
--- a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h
+++ b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h
@@ -56,7 +56,7 @@ public:
   bool IsIterativeMappingEnabled() const;
   void ShowExtensionMotionTabs(bool show);
   void ActivateExtensionTab();
-  void OnMappingChange(int source);
+  void OnMappingChange();
 
 signals:
   // Emitted when config has changed so widgets can update to reflect the change.