diff --git a/Telegram/SourceFiles/calls/calls_call.cpp b/Telegram/SourceFiles/calls/calls_call.cpp
index 40efaa9a9f..e3624105c7 100644
--- a/Telegram/SourceFiles/calls/calls_call.cpp
+++ b/Telegram/SourceFiles/calls/calls_call.cpp
@@ -241,9 +241,11 @@ void Call::startIncoming() {
 }
 
 void Call::answer() {
-	_delegate->requestMicrophonePermissionOrFail([this](){ actuallyAnswer(); });
+	_delegate->requestMicrophonePermissionOrFail(crl::guard(this, [=] {
+		actuallyAnswer();
+	}));
 }
-	
+
 void Call::actuallyAnswer() {
 	Expects(_type == Type::Incoming);
 
diff --git a/Telegram/SourceFiles/calls/calls_instance.cpp b/Telegram/SourceFiles/calls/calls_instance.cpp
index 1ce388a3f3..f51bf1f0ae 100644
--- a/Telegram/SourceFiles/calls/calls_instance.cpp
+++ b/Telegram/SourceFiles/calls/calls_instance.cpp
@@ -40,9 +40,9 @@ void Instance::startOutgoingCall(not_null<UserData*> user) {
 		Ui::show(Box<InformBox>(lng_call_error_not_available(lt_user, App::peerName(user))));
 		return;
 	}
-	requestMicrophonePermissionOrFail([this, user](){
+	requestMicrophonePermissionOrFail(crl::guard(this, [=] {
 		createCall(user, Call::Type::Outgoing);
-	});
+	}));
 }
 
 void Instance::callFinished(not_null<Call*> call) {
@@ -288,13 +288,13 @@ void Instance::handleCallUpdate(const MTPPhoneCall &call) {
 bool Instance::alreadyInCall() {
 	return (_currentCall && _currentCall->state() != Call::State::Busy);
 }
-	
+
 void Instance::requestMicrophonePermissionOrFail(Fn<void()> onSuccess) {
 	Platform::PermissionStatus status=Platform::GetPermissionStatus(Platform::PermissionType::Microphone);
 	if (status==Platform::PermissionStatus::Granted) {
 		onSuccess();
 	} else if(status==Platform::PermissionStatus::CanRequest) {
-		Platform::RequestPermission(Platform::PermissionType::Microphone, [this, onSuccess](Platform::PermissionStatus status){
+		Platform::RequestPermission(Platform::PermissionType::Microphone, crl::guard(this, [=](Platform::PermissionStatus status) {
 			if (status==Platform::PermissionStatus::Granted) {
 				crl::on_main(onSuccess);
 			} else {
@@ -302,15 +302,15 @@ void Instance::requestMicrophonePermissionOrFail(Fn<void()> onSuccess) {
 					_currentCall->hangup();
 				}
 			}
-		});
+		}));
 	} else {
 		if (alreadyInCall()) {
 			_currentCall->hangup();
 		}
-		Ui::show(Box<ConfirmBox>(lang(lng_no_mic_permission), lang(lng_menu_settings), [](){
+		Ui::show(Box<ConfirmBox>(lang(lng_no_mic_permission), lang(lng_menu_settings), crl::guard(this, [] {
 			Platform::OpenSystemSettingsForPermission(Platform::PermissionType::Microphone);
 			Ui::hideLayer();
-		}));
+		})));
 	}
 }
 
diff --git a/Telegram/SourceFiles/calls/calls_instance.h b/Telegram/SourceFiles/calls/calls_instance.h
index 4e9f26cf8a..99f48b62c8 100644
--- a/Telegram/SourceFiles/calls/calls_instance.h
+++ b/Telegram/SourceFiles/calls/calls_instance.h
@@ -28,7 +28,7 @@ enum class PeerToPeer {
 
 class Panel;
 
-class Instance : private MTP::Sender, private Call::Delegate, private base::Subscriber {
+class Instance : private MTP::Sender, private Call::Delegate, private base::Subscriber, public base::has_weak_ptr {
 public:
 	Instance();
 
diff --git a/Telegram/SourceFiles/platform/linux/specific_linux.cpp b/Telegram/SourceFiles/platform/linux/specific_linux.cpp
index a8fdd79af5..d11b912871 100644
--- a/Telegram/SourceFiles/platform/linux/specific_linux.cpp
+++ b/Telegram/SourceFiles/platform/linux/specific_linux.cpp
@@ -438,11 +438,10 @@ PermissionStatus GetPermissionStatus(PermissionType type){
 }
 
 void RequestPermission(PermissionType type, Fn<void(PermissionStatus)> resultCallback){
-
+	resultCallback(PermissionStatus::Granted);
 }
 
 void OpenSystemSettingsForPermission(PermissionType type){
-
 }
 
 namespace ThirdParty {
diff --git a/Telegram/SourceFiles/platform/mac/specific_mac.mm b/Telegram/SourceFiles/platform/mac/specific_mac.mm
index d2883e0076..67b98cf842 100644
--- a/Telegram/SourceFiles/platform/mac/specific_mac.mm
+++ b/Telegram/SourceFiles/platform/mac/specific_mac.mm
@@ -288,7 +288,8 @@ void RegisterCustomScheme() {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunguarded-availability"
 PermissionStatus GetPermissionStatus(PermissionType type) {
-	switch(type) {
+#ifndef OS_MAC_OLD
+	switch (type) {
 		case PermissionType::Microphone:
 			if([AVCaptureDevice respondsToSelector: @selector(authorizationStatusForMediaType:)]) { // Available starting with 10.14
 				switch([AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio]) {
@@ -301,32 +302,38 @@ PermissionStatus GetPermissionStatus(PermissionType type) {
 						return PermissionStatus::Denied;
 				}
 			}
-			return PermissionStatus::Granted;
+			break;
 	}
+#endif // OS_MAC_OLD
 	return PermissionStatus::Granted;
 }
 
 void RequestPermission(PermissionType type, Fn<void(PermissionStatus)> resultCallback) {
-	switch(type) {
+#ifndef OS_MAC_OLD
+	switch (type) {
 		case PermissionType::Microphone:
-			if([AVCaptureDevice respondsToSelector: @selector(requestAccessForMediaType:completionHandler:)]) { // Available starting with 10.14
-    			[AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
-    				resultCallback(granted ? PermissionStatus::Granted : PermissionStatus::Denied);
-    			}];
-			}else{
-				resultCallback(PermissionStatus::Granted);
+			if ([AVCaptureDevice respondsToSelector: @selector(requestAccessForMediaType:completionHandler:)]) { // Available starting with 10.14
+				[AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
+					crl::on_main([=] {
+						resultCallback(granted ? PermissionStatus::Granted : PermissionStatus::Denied);
+					});
+				}];
 			}
 			break;
 	}
+#endif // OS_MAC_OLD
+	resultCallback(PermissionStatus::Granted);
 }
 #pragma clang diagnostic pop // -Wunguarded-availability
-	
+
 void OpenSystemSettingsForPermission(PermissionType type) {
-	switch(type) {
+#ifndef OS_MAC_OLD
+	switch (type) {
 		case PermissionType::Microphone:
 			[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:@"x-apple.systempreferences:com.apple.preference.security?Privacy_Microphone"]];
 			break;
 	}
+#endif // OS_MAC_OLD
 }
 
 } // namespace Platform
diff --git a/Telegram/SourceFiles/platform/platform_specific.h b/Telegram/SourceFiles/platform/platform_specific.h
index 266e23d36b..03a32b2af8 100644
--- a/Telegram/SourceFiles/platform/platform_specific.h
+++ b/Telegram/SourceFiles/platform/platform_specific.h
@@ -11,12 +11,13 @@ namespace Platform {
 
 void start();
 void finish();
-	
+
 enum class PermissionStatus {
 	Granted,
 	CanRequest,
 	Denied,
 };
+
 enum class PermissionType {
 	Microphone,
 };
diff --git a/Telegram/SourceFiles/platform/win/specific_win.cpp b/Telegram/SourceFiles/platform/win/specific_win.cpp
index 1a8aab63d1..e4087f1d9d 100644
--- a/Telegram/SourceFiles/platform/win/specific_win.cpp
+++ b/Telegram/SourceFiles/platform/win/specific_win.cpp
@@ -627,7 +627,7 @@ void RegisterCustomScheme() {
 }
 
 PermissionStatus GetPermissionStatus(PermissionType type) {
-	if(type==PermissionType::Microphone) {
+	if (type==PermissionType::Microphone) {
 		PermissionStatus result=PermissionStatus::Granted;
 		HKEY hKey;
 		LSTATUS res=RegOpenKeyEx(HKEY_CURRENT_USER, L"Software\\Microsoft\\Windows\\CurrentVersion\\CapabilityAccessManager\\ConsentStore\\microphone", 0, KEY_QUERY_VALUE, &hKey);
@@ -648,11 +648,11 @@ PermissionStatus GetPermissionStatus(PermissionType type) {
 }
 
 void RequestPermission(PermissionType type, Fn<void(PermissionStatus)> resultCallback) {
-
+	resultCallback(PermissionStatus::Granted);
 }
 
 void OpenSystemSettingsForPermission(PermissionType type) {
-	if(type==PermissionType::Microphone) {
+	if (type==PermissionType::Microphone) {
 		ShellExecute(NULL, L"open", L"ms-settings:privacy-microphone", NULL, NULL, SW_SHOWDEFAULT);
 	}
 }