diff --git a/src/conference/conference-interface.h b/src/conference/conference-interface.h
index b4241d34c..1cd62ec6d 100644
--- a/src/conference/conference-interface.h
+++ b/src/conference/conference-interface.h
@@ -30,7 +30,7 @@
 
 LINPHONE_BEGIN_NAMESPACE
 
-class ConferenceInterface {
+class LINPHONE_PUBLIC ConferenceInterface {
 public:
 	virtual ~ConferenceInterface() = default;
 
diff --git a/src/conference/conference.h b/src/conference/conference.h
index 403602459..b9a89cd31 100644
--- a/src/conference/conference.h
+++ b/src/conference/conference.h
@@ -34,7 +34,7 @@ LINPHONE_BEGIN_NAMESPACE
 
 class CallSessionPrivate;
 
-class Conference : public ConferenceInterface, public CallSessionListener {
+class LINPHONE_PUBLIC Conference : public ConferenceInterface, public CallSessionListener {
 	friend class CallSessionPrivate;
 
 public:
diff --git a/src/conference/remote-conference.h b/src/conference/remote-conference.h
index c6eda721d..8ae6c2f1f 100644
--- a/src/conference/remote-conference.h
+++ b/src/conference/remote-conference.h
@@ -26,7 +26,7 @@
 
 LINPHONE_BEGIN_NAMESPACE
 
-class RemoteConference : public Conference, public ConferenceListener {
+class LINPHONE_PUBLIC RemoteConference : public Conference, public ConferenceListener {
 public:
 	RemoteConference (LinphoneCore *core, const Address &myAddress, CallListener *listener = nullptr);
 	virtual ~RemoteConference();
diff --git a/src/conference/session/call-session-listener.h b/src/conference/session/call-session-listener.h
index e5dd8d8ca..cae85a71e 100644
--- a/src/conference/session/call-session-listener.h
+++ b/src/conference/session/call-session-listener.h
@@ -23,7 +23,7 @@
 
 LINPHONE_BEGIN_NAMESPACE
 
-class CallSessionListener {
+class LINPHONE_PUBLIC CallSessionListener {
 public:
 	virtual ~CallSessionListener() = default;
 
diff --git a/src/conference/session/call-session.h b/src/conference/session/call-session.h
index 74b95461b..a43331c2e 100644
--- a/src/conference/session/call-session.h
+++ b/src/conference/session/call-session.h
@@ -33,7 +33,7 @@ LINPHONE_BEGIN_NAMESPACE
 class CallPrivate;
 class CallSessionPrivate;
 
-class CallSession : public Object {
+class LINPHONE_PUBLIC CallSession : public Object {
 	friend class CallPrivate;
 	friend class ClientGroupChatRoom;
 
diff --git a/src/conference/session/media-session.h b/src/conference/session/media-session.h
index 00aeebdfe..4de168815 100644
--- a/src/conference/session/media-session.h
+++ b/src/conference/session/media-session.h
@@ -30,7 +30,7 @@ class CallPrivate;
 class IceAgent;
 class MediaSessionPrivate;
 
-class MediaSession : public CallSession {
+class LINPHONE_PUBLIC MediaSession : public CallSession {
 	friend class CallPrivate;
 	friend class IceAgent;