diff --git a/CHANGES b/CHANGES
index c552ba13f..8e65863d7 100644
--- a/CHANGES
+++ b/CHANGES
@@ -26,6 +26,7 @@ Other fixes:
  - Debugger: Fix writing to specific segment in command-line debugger
  - mGUI: Fix cases where an older save state screenshot would be shown. (fixes mgba.io/i/2183)
  - Qt: Fix savestate preview sizes with different scales (fixes mgba.io/i/2560)
+ - Qt: Re-enable sync for multiplayer windows that aren't connected (fixes mgba.io/i/2974)
 Misc:
  - Core: Handle relative paths for saves, screenshots, etc consistently (fixes mgba.io/i/2826)
  - GB: Prevent incompatible BIOSes from being used on differing models
diff --git a/src/platform/qt/MultiplayerController.cpp b/src/platform/qt/MultiplayerController.cpp
index 972213f67..7ded956a4 100644
--- a/src/platform/qt/MultiplayerController.cpp
+++ b/src/platform/qt/MultiplayerController.cpp
@@ -92,6 +92,10 @@ MultiplayerController::MultiplayerController() {
 			if (!id) {
 				for (int i = 1; i < controller->m_players.count(); ++i) {
 					player = controller->player(i);
+					if (player->node.gba->d.p->mode > SIO_MULTI) {
+						player->controller->setSync(true);
+						continue;
+					}
 					player->controller->setSync(false);
 					player->cyclesPosted += cycles;
 					if (player->awake < 1) {