diff --git a/Common/System/System.h b/Common/System/System.h
index 5e594f2d62..f984c01faf 100644
--- a/Common/System/System.h
+++ b/Common/System/System.h
@@ -311,7 +311,7 @@ bool System_AudioRecordingIsAvailable();
 bool System_AudioRecordingState();
 
 // This will be changed to take an enum. Replacement for the old NativeMessageReceived.
-void System_PostUIMessage(UIMessage message, const std::string &param = "");
+void System_PostUIMessage(UIMessage message, std::string_view param = "");
 
 // For these functions, most platforms will use the implementation provided in UI/AudioCommon.cpp,
 // no need to implement separately.
diff --git a/Qt/mainwindow.cpp b/Qt/mainwindow.cpp
index a78e8e70eb..082624fabd 100644
--- a/Qt/mainwindow.cpp
+++ b/Qt/mainwindow.cpp
@@ -130,7 +130,7 @@ void MainWindow::loadAct()
 	{
 		QFileInfo info(filename);
 		g_Config.currentDirectory = Path(info.absolutePath().toStdString());
-		System_PostUIMessage(UIMessage::REQUEST_GAME_BOOT, filename.toStdString().c_str());
+		System_PostUIMessage(UIMessage::REQUEST_GAME_BOOT, filename.toStdString());
 	}
 }
 
diff --git a/SDL/CocoaBarItems.mm b/SDL/CocoaBarItems.mm
index 2c607e9ca4..a76cbe02f7 100644
--- a/SDL/CocoaBarItems.mm
+++ b/SDL/CocoaBarItems.mm
@@ -641,7 +641,7 @@ TOGGLE_METHOD(FullScreen, g_Config.bFullScreen, System_MakeRequest(SystemRequest
 }
 
 -(void)openRecentItem: (NSMenuItem *)item {
-    System_PostUIMessage(UIMessage::REQUEST_GAME_BOOT, g_recentFiles.GetRecentFiles()[item.tag].c_str());
+    System_PostUIMessage(UIMessage::REQUEST_GAME_BOOT, g_recentFiles.GetRecentFiles()[item.tag]);
 }
 
 -(void)openSystemFileBrowser {
diff --git a/UI/NativeApp.cpp b/UI/NativeApp.cpp
index e4bc67d6a0..8421e409fe 100644
--- a/UI/NativeApp.cpp
+++ b/UI/NativeApp.cpp
@@ -1509,11 +1509,11 @@ void NativeAccelerometer(float tiltX, float tiltY, float tiltZ) {
 	HLEPlugins::PluginDataAxis[JOYSTICK_AXIS_ACCELEROMETER_Z] = tiltZ;
 }
 
-void System_PostUIMessage(UIMessage message, const std::string &value) {
+void System_PostUIMessage(UIMessage message, std::string_view param) {
 	std::lock_guard<std::mutex> lock(g_pendingMutex);
 	PendingMessage pendingMessage;
 	pendingMessage.message = message;
-	pendingMessage.value = value;
+	pendingMessage.value = param;
 	pendingMessages.push_back(pendingMessage);
 }
 
diff --git a/UI/TabbedDialogScreen.cpp b/UI/TabbedDialogScreen.cpp
index a68b2ab13b..c4b3dd81dd 100644
--- a/UI/TabbedDialogScreen.cpp
+++ b/UI/TabbedDialogScreen.cpp
@@ -82,7 +82,7 @@ void TabbedUIDialogScreenWithGameBackground::CreateViews() {
 
 				searchSettings->Add(new ItemHeader(se->T("Find settings")));
 				searchSettings->Add(new PopupTextInputChoice(GetRequesterToken(), &searchFilter_, se->T("Filter"), "", 64, screenManager()))->OnChange.Add([=](UI::EventParams &e) {
-					System_PostUIMessage(UIMessage::GAMESETTINGS_SEARCH, std::string(StripSpaces(searchFilter_)));
+					System_PostUIMessage(UIMessage::GAMESETTINGS_SEARCH, StripSpaces(searchFilter_));
 					return UI::EVENT_DONE;
 				});
 
diff --git a/headless/Headless.cpp b/headless/Headless.cpp
index 3fa6094274..60b38f2eeb 100644
--- a/headless/Headless.cpp
+++ b/headless/Headless.cpp
@@ -93,7 +93,7 @@ bool System_GetPropertyBool(SystemProperty prop) {
 	}
 }
 void System_Notify(SystemNotification notification) {}
-void System_PostUIMessage(UIMessage message, const std::string &param) {}
+void System_PostUIMessage(UIMessage message, std::string_view param) {}
 void System_RunOnMainThread(std::function<void()>) {}
 bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int64_t param3, int64_t param4) {
 	switch (type) {
diff --git a/libretro/libretro.cpp b/libretro/libretro.cpp
index 9dea246397..9f805f25f3 100644
--- a/libretro/libretro.cpp
+++ b/libretro/libretro.cpp
@@ -1999,7 +1999,7 @@ void System_Notify(SystemNotification notification) {
    }
 }
 bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int64_t param3, int64_t param4) { return false; }
-void System_PostUIMessage(UIMessage message, const std::string &param) {}
+void System_PostUIMessage(UIMessage message, std::string_view param) {}
 void System_RunOnMainThread(std::function<void()>) {}
 void NativeFrame(GraphicsContext *graphicsContext) {}
 void NativeResized() {}
diff --git a/unittest/UnitTest.cpp b/unittest/UnitTest.cpp
index d9c0d38877..f967c574a9 100644
--- a/unittest/UnitTest.cpp
+++ b/unittest/UnitTest.cpp
@@ -112,7 +112,7 @@ bool System_GetPropertyBool(SystemProperty prop) {
 	}
 }
 void System_Notify(SystemNotification notification) {}
-void System_PostUIMessage(UIMessage message, const std::string &param) {}
+void System_PostUIMessage(UIMessage message, std::string_view param) {}
 void System_RunOnMainThread(std::function<void()>) {}
 void System_AudioGetDebugStats(char *buf, size_t bufSize) { if (buf) buf[0] = '\0'; }
 void System_AudioClear() {}