diff --git a/CHANGES b/CHANGES
index dcd5f9edf..de7213408 100644
--- a/CHANGES
+++ b/CHANGES
@@ -27,6 +27,7 @@ Other fixes:
  - GB Video: Fix memory leak when reseting SGB games
  - GBA: Fix out of bounds ROM accesses on patched ROMs smaller than 32 MiB
  - Libretro: Fix crash when using Game Boy codes (fixes mgba.io/i/2281)
+ - Qt: Fix corrupted savestate and fatal error text
 Misc:
  - Core: Suspend runloop when a core crashes
  - mGUI: Add margin to right-aligned menu text (fixes mgba.io/i/871)
diff --git a/src/platform/qt/CoreController.cpp b/src/platform/qt/CoreController.cpp
index 58ba1797d..b71b611ea 100644
--- a/src/platform/qt/CoreController.cpp
+++ b/src/platform/qt/CoreController.cpp
@@ -183,14 +183,17 @@ CoreController::CoreController(mCore* core, QObject* parent)
 					return;
 				}
 			}
-			message = QString().vsprintf(format, args);
+			va_list argc;
+			va_copy(argc, args);
+			message = QString().vsprintf(format, argc);
+			va_end(argc);
 			QMetaObject::invokeMethod(controller, "statusPosted", Q_ARG(const QString&, message));
 		}
 		message = QString().vsprintf(format, args);
 		QMetaObject::invokeMethod(controller, "logPosted", Q_ARG(int, level), Q_ARG(int, category), Q_ARG(const QString&, message));
 		if (level == mLOG_FATAL) {
 			mCoreThreadMarkCrashed(controller->thread());
-			QMetaObject::invokeMethod(controller, "crashed", Q_ARG(const QString&, QString().vsprintf(format, args)));
+			QMetaObject::invokeMethod(controller, "crashed", Q_ARG(const QString&, message));
 		}
 	};
 }