diff --git a/AK/HashFunctions.h b/AK/HashFunctions.h
index a5c8dd1ed71fc5..e60d110d3bf4a8 100644
--- a/AK/HashFunctions.h
+++ b/AK/HashFunctions.h
@@ -26,7 +26,7 @@
 
 #pragma once
 
-#include "Types.h"
+#include <AK/Types.h>
 
 constexpr unsigned int_hash(u32 key)
 {
diff --git a/Kernel/Process.h b/Kernel/Process.h
index 1ad36dc83de841..968f206e5d14b2 100644
--- a/Kernel/Process.h
+++ b/Kernel/Process.h
@@ -49,7 +49,7 @@
 #include <Kernel/VM/AllocationStrategy.h>
 #include <Kernel/VM/RangeAllocator.h>
 #include <LibC/signal_numbers.h>
-#include <Libraries/LibELF/exec_elf.h>
+#include <LibELF/exec_elf.h>
 
 namespace Kernel {
 
diff --git a/Userland/Applications/Calculator/CalculatorWidget.cpp b/Userland/Applications/Calculator/CalculatorWidget.cpp
index 083edae93baaf9..df648640a0da67 100644
--- a/Userland/Applications/Calculator/CalculatorWidget.cpp
+++ b/Userland/Applications/Calculator/CalculatorWidget.cpp
@@ -26,8 +26,8 @@
  */
 
 #include "CalculatorWidget.h"
-#include "Applications/Calculator/CalculatorGML.h"
 #include <AK/Assertions.h>
+#include <Applications/Calculator/CalculatorGML.h>
 #include <LibGUI/Button.h>
 #include <LibGUI/Label.h>
 #include <LibGUI/TextBox.h>
diff --git a/Userland/DevTools/HackStudio/LanguageClient.cpp b/Userland/DevTools/HackStudio/LanguageClient.cpp
index 98341a046f4881..1afc59bd6023a7 100644
--- a/Userland/DevTools/HackStudio/LanguageClient.cpp
+++ b/Userland/DevTools/HackStudio/LanguageClient.cpp
@@ -25,9 +25,9 @@
  */
 
 #include "LanguageClient.h"
-#include "DevTools/HackStudio/LanguageServers/LanguageServerEndpoint.h"
 #include <AK/String.h>
 #include <AK/Vector.h>
+#include <DevTools/HackStudio/LanguageServers/LanguageServerEndpoint.h>
 
 namespace HackStudio {
 
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp b/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp
index 197fd91f278e21..524d6d6f505680 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp
@@ -24,8 +24,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "ClientConnection.h"
 #include <AK/LexicalPath.h>
-#include <DevTools/HackStudio/LanguageServers/Cpp/ClientConnection.h>
 #include <LibCore/EventLoop.h>
 #include <LibCore/File.h>
 #include <LibCore/LocalServer.h>
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp b/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp
index 90e3f622718be5..356eced9ffba8a 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp
@@ -24,8 +24,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "ClientConnection.h"
 #include <AK/LexicalPath.h>
-#include <DevTools/HackStudio/LanguageServers/Shell/ClientConnection.h>
 #include <LibCore/EventLoop.h>
 #include <LibCore/File.h>
 #include <LibCore/LocalServer.h>
diff --git a/Userland/Utilities/tree.cpp b/Userland/Utilities/tree.cpp
index 5f6dd334a5ecf9..7212a56fc227b1 100644
--- a/Userland/Utilities/tree.cpp
+++ b/Userland/Utilities/tree.cpp
@@ -32,7 +32,7 @@
 #include <AK/Vector.h>
 #include <LibCore/ArgsParser.h>
 #include <LibCore/DirIterator.h>
-#include <cstdio>
+#include <stdio.h>
 #include <sys/stat.h>
 
 static bool flag_show_hidden_files = false;