diff --git a/AK/MemoryStream.h b/AK/MemoryStream.h
index e72d63ac8a..4e5f4680dc 100644
--- a/AK/MemoryStream.h
+++ b/AK/MemoryStream.h
@@ -8,7 +8,6 @@
 #pragma once
 
 #include <AK/Error.h>
-#include <AK/OwnPtr.h>
 #include <AK/Stream.h>
 #include <AK/Vector.h>
 
diff --git a/Libraries/LibCompress/PackBitsDecoder.cpp b/Libraries/LibCompress/PackBitsDecoder.cpp
index 537b4a3fcf..1e5567ed6e 100644
--- a/Libraries/LibCompress/PackBitsDecoder.cpp
+++ b/Libraries/LibCompress/PackBitsDecoder.cpp
@@ -6,6 +6,7 @@
 
 #include "PackBitsDecoder.h"
 #include <AK/MemoryStream.h>
+#include <AK/NonnullOwnPtr.h>
 
 namespace Compress::PackBits {
 
diff --git a/Tests/LibDiff/TestDiff.cpp b/Tests/LibDiff/TestDiff.cpp
index 1ccfe84b81..74f9820f47 100644
--- a/Tests/LibDiff/TestDiff.cpp
+++ b/Tests/LibDiff/TestDiff.cpp
@@ -5,6 +5,7 @@
  */
 
 #include <AK/MemoryStream.h>
+#include <AK/NonnullOwnPtr.h>
 #include <LibDiff/Format.h>
 #include <LibDiff/Generator.h>
 #include <LibTest/TestCase.h>