diff --git a/src/aws-cpp-sdk-core/include/aws/core/Globals.h b/src/aws-cpp-sdk-core/include/aws/core/Globals.h
index 08dfafce09d..7a45ddaeb0d 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/Globals.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/Globals.h
@@ -6,6 +6,7 @@
 #pragma once
 
 #include <aws/core/Core_EXPORTS.h>
+#include <memory>
 
 namespace Aws
 {
diff --git a/src/aws-cpp-sdk-core/include/aws/core/NoResult.h b/src/aws-cpp-sdk-core/include/aws/core/NoResult.h
index c4f233cbb96..f1822f2282e 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/NoResult.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/NoResult.h
@@ -6,6 +6,7 @@
 #pragma once
 
 #include <aws/core/Core_EXPORTS.h>
+#include <aws/core/AmazonWebServiceResult.h>
 
 namespace Aws
 {
diff --git a/src/aws-cpp-sdk-core/include/aws/core/monitoring/MonitoringFactory.h b/src/aws-cpp-sdk-core/include/aws/core/monitoring/MonitoringFactory.h
index 2d03efa7125..5970d695568 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/monitoring/MonitoringFactory.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/monitoring/MonitoringFactory.h
@@ -5,6 +5,7 @@
 
 #pragma once
 #include <aws/core/Core_EXPORTS.h>
+#include <aws/core/utils/memory/AWSMemory.h>
 
 namespace Aws
 {
diff --git a/src/aws-cpp-sdk-core/include/aws/core/utils/event/EventStreamEncoder.h b/src/aws-cpp-sdk-core/include/aws/core/utils/event/EventStreamEncoder.h
index 656388b8e87..25494cdcb87 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/utils/event/EventStreamEncoder.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/utils/event/EventStreamEncoder.h
@@ -8,6 +8,8 @@
 #include <aws/core/Core_EXPORTS.h>
 #include <aws/core/utils/memory/stl/AWSVector.h>
 #include <aws/event-stream/event_stream.h>
+#include <aws/core/utils/memory/stl/AWSString.h>
+#include <aws/core/utils/event/EventMessage.h>
 
 namespace Aws
 {
diff --git a/src/aws-cpp-sdk-core/include/aws/core/utils/stream/StreamBufProtectedWriter.h b/src/aws-cpp-sdk-core/include/aws/core/utils/stream/StreamBufProtectedWriter.h
index d4d8c3d9f3f..30ebf45c8d8 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/utils/stream/StreamBufProtectedWriter.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/utils/stream/StreamBufProtectedWriter.h
@@ -10,6 +10,9 @@
 #include <aws/core/utils/Array.h>
 #include <streambuf>
 #include <functional>
+#include <cstdint>
+#include <aws/core/utils/memory/stl/AWSStreamFwd.h>
+#include <aws/core/utils/logging/LogMacros.h>
 
 namespace Aws
 {