diff --git a/MongoDB/src/OpMsgMessage.cpp b/MongoDB/src/OpMsgMessage.cpp
index f91fe876f..3dc0c5946 100644
--- a/MongoDB/src/OpMsgMessage.cpp
+++ b/MongoDB/src/OpMsgMessage.cpp
@@ -14,8 +14,7 @@
 #include "Poco/MongoDB/OpMsgMessage.h"
 #include "Poco/MongoDB/MessageHeader.h"
 #include "Poco/MongoDB/Array.h"
-#include "Poco/StreamCopier.h"
-#include "Poco/Logger.h"
+#include <map>
 
 #define POCO_MONGODB_DUMP	false
 
diff --git a/MongoDB/src/ReadPreference.cpp b/MongoDB/src/ReadPreference.cpp
index 97205301a..90019a73a 100644
--- a/MongoDB/src/ReadPreference.cpp
+++ b/MongoDB/src/ReadPreference.cpp
@@ -14,9 +14,7 @@
 
 #include "Poco/MongoDB/ReadPreference.h"
 #include "Poco/MongoDB/TopologyDescription.h"
-#include "Poco/Random.h"
 #include "Poco/Format.h"
-#include <algorithm>
 #include <limits>
 
 
diff --git a/MongoDB/src/RegularExpression.cpp b/MongoDB/src/RegularExpression.cpp
index 968945d83..7ae2ed22b 100644
--- a/MongoDB/src/RegularExpression.cpp
+++ b/MongoDB/src/RegularExpression.cpp
@@ -13,7 +13,6 @@
 
 
 #include "Poco/MongoDB/RegularExpression.h"
-#include <sstream>
 
 
 namespace Poco {
diff --git a/MongoDB/src/ReplicaSet.cpp b/MongoDB/src/ReplicaSet.cpp
index 0b32f2b28..1231ec66d 100644
--- a/MongoDB/src/ReplicaSet.cpp
+++ b/MongoDB/src/ReplicaSet.cpp
@@ -16,7 +16,6 @@
 #include "Poco/MongoDB/OpMsgMessage.h"
 #include "Poco/Exception.h"
 #include "Poco/Random.h"
-#include "Poco/Thread.h"
 #include "Poco/URI.h"
 #include "Poco/NumberParser.h"
 #include <chrono>
diff --git a/MongoDB/src/ServerDescription.cpp b/MongoDB/src/ServerDescription.cpp
index 4d27eb50d..eb8127e8f 100644
--- a/MongoDB/src/ServerDescription.cpp
+++ b/MongoDB/src/ServerDescription.cpp
@@ -14,8 +14,6 @@
 
 #include "Poco/MongoDB/ServerDescription.h"
 #include "Poco/MongoDB/Array.h"
-#include "Poco/Exception.h"
-#include "Poco/StringTokenizer.h"
 
 
 namespace Poco {
diff --git a/MongoDB/src/TopologyDescription.cpp b/MongoDB/src/TopologyDescription.cpp
index b2c36589d..efc820a04 100644
--- a/MongoDB/src/TopologyDescription.cpp
+++ b/MongoDB/src/TopologyDescription.cpp
@@ -13,7 +13,6 @@
 
 
 #include "Poco/MongoDB/TopologyDescription.h"
-#include "Poco/Exception.h"
 
 
 namespace Poco {