diff --git a/Source/Core/DolphinQt/CheatsManager.h b/Source/Core/DolphinQt/CheatsManager.h
index 6992daec2a..9a2e43eafc 100644
--- a/Source/Core/DolphinQt/CheatsManager.h
+++ b/Source/Core/DolphinQt/CheatsManager.h
@@ -8,7 +8,6 @@
 #include <vector>
 
 #include <QDialog>
-#include <QString>
 
 #include "Common/CommonTypes.h"
 
diff --git a/Source/Core/DolphinQt/DiscordJoinRequestDialog.h b/Source/Core/DolphinQt/DiscordJoinRequestDialog.h
index d9a7a8c9dd..e97581ee63 100644
--- a/Source/Core/DolphinQt/DiscordJoinRequestDialog.h
+++ b/Source/Core/DolphinQt/DiscordJoinRequestDialog.h
@@ -4,9 +4,10 @@
 
 #pragma once
 
-#include <QDialog>
 #include <ctime>
 
+#include <QDialog>
+
 class QGridLayout;
 class QPixmap;
 
diff --git a/Source/Core/DolphinQt/GCMemcardManager.h b/Source/Core/DolphinQt/GCMemcardManager.h
index ae20f5a700..e1579abe11 100644
--- a/Source/Core/DolphinQt/GCMemcardManager.h
+++ b/Source/Core/DolphinQt/GCMemcardManager.h
@@ -17,6 +17,7 @@ class QDialogButtonBox;
 class QGroupBox;
 class QLabel;
 class QLineEdit;
+class QPixmap;
 class QPushButton;
 class QTableWidget;
 class QTimer;
diff --git a/Source/Core/DolphinQt/MenuBar.h b/Source/Core/DolphinQt/MenuBar.h
index 1d731d240a..4cfa719028 100644
--- a/Source/Core/DolphinQt/MenuBar.h
+++ b/Source/Core/DolphinQt/MenuBar.h
@@ -8,10 +8,11 @@
 #include <memory>
 #include <string>
 
-#include <QMenu>
 #include <QMenuBar>
 #include <QPointer>
 
+class QMenu;
+
 namespace Core
 {
 enum class State;
diff --git a/Source/Core/DolphinQt/Settings.cpp b/Source/Core/DolphinQt/Settings.cpp
index 4d54b98b29..d8abe9b723 100644
--- a/Source/Core/DolphinQt/Settings.cpp
+++ b/Source/Core/DolphinQt/Settings.cpp
@@ -7,7 +7,6 @@
 #include <QApplication>
 #include <QDir>
 #include <QFile>
-#include <QSettings>
 #include <QSize>
 
 #include "AudioCommon/AudioCommon.h"
diff --git a/Source/Core/DolphinQt/Settings.h b/Source/Core/DolphinQt/Settings.h
index ef03490b63..5a34ecbba1 100644
--- a/Source/Core/DolphinQt/Settings.h
+++ b/Source/Core/DolphinQt/Settings.h
@@ -9,7 +9,6 @@
 #include <QFont>
 #include <QObject>
 #include <QSettings>
-#include <QVector>
 
 namespace Core
 {
@@ -29,7 +28,6 @@ class NetPlayServer;
 
 class GameListModel;
 class InputConfig;
-class QFont;
 
 // UI settings to be stored in the config directory.
 class Settings final : public QObject
diff --git a/Source/Core/DolphinQt/ToolBar.cpp b/Source/Core/DolphinQt/ToolBar.cpp
index d646f4e1a6..d6ba3e9c96 100644
--- a/Source/Core/DolphinQt/ToolBar.cpp
+++ b/Source/Core/DolphinQt/ToolBar.cpp
@@ -5,6 +5,7 @@
 #include <algorithm>
 #include <vector>
 
+#include <QAction>
 #include <QIcon>
 
 #include "Core/Core.h"
diff --git a/Source/Core/DolphinQt/ToolBar.h b/Source/Core/DolphinQt/ToolBar.h
index a6123654a3..04e7b35b50 100644
--- a/Source/Core/DolphinQt/ToolBar.h
+++ b/Source/Core/DolphinQt/ToolBar.h
@@ -4,10 +4,10 @@
 
 #pragma once
 
-#include <QAction>
-#include <QLineEdit>
 #include <QToolBar>
 
+class QAction;
+
 namespace Core
 {
 enum class State;
diff --git a/Source/Core/UICommon/DiscordPresence.cpp b/Source/Core/UICommon/DiscordPresence.cpp
index dcaf8906c5..93aa2b47ed 100644
--- a/Source/Core/UICommon/DiscordPresence.cpp
+++ b/Source/Core/UICommon/DiscordPresence.cpp
@@ -189,7 +189,7 @@ void Init()
   handlers.ready = HandleDiscordReady;
   handlers.joinRequest = HandleDiscordJoinRequest;
   handlers.joinGame = HandleDiscordJoin;
-  // The number is the client ID for Dolphin, it's used for images and the appication name
+  // The number is the client ID for Dolphin, it's used for images and the application name
   Discord_Initialize("455712169795780630", &handlers, 1, nullptr);
   UpdateDiscordPresence();
 #endif