diff --git a/CHANGES b/CHANGES
index 4c5c8466d..c8cc483f2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -23,6 +23,7 @@ Bugfixes:
  - GBA: Fix some GBA ROM misdetection (fixes mgba.io/i/978)
  - GBA Hardware: RTC accuracy improvements
  - GBA: Fix SharkPort saves for EEPROM games
+ - Qt: Fix opening in fullscreen (fixes mgba.io/i/993)
 Misc:
  - GBA: Improve multiboot image detection
  - GB MBC: Remove erroneous bank 0 wrapping
diff --git a/src/platform/qt/Window.cpp b/src/platform/qt/Window.cpp
index 1e0abeb09..8e340af4c 100644
--- a/src/platform/qt/Window.cpp
+++ b/src/platform/qt/Window.cpp
@@ -244,7 +244,9 @@ void Window::resizeFrame(const QSize& size) {
 	m_screenWidget->setSizeHint(newSize);
 	newSize -= m_screenWidget->size();
 	newSize += this->size();
-	resize(newSize);
+	if (!isFullScreen()) {
+		resize(newSize);
+	}
 }
 
 void Window::setConfig(ConfigController* config) {