diff --git a/src/gui/render/renderDX11.cpp b/src/gui/render/renderDX11.cpp
index 53893accd..0cf0e4f59 100644
--- a/src/gui/render/renderDX11.cpp
+++ b/src/gui/render/renderDX11.cpp
@@ -565,6 +565,6 @@ void FurnaceGUIRenderDX11::quitGUI() {
   ImGui_ImplDX11_Shutdown();
 }
 
-void FurnaceGUIRenderDX11::isDead() {
+bool FurnaceGUIRenderDX11::isDead() {
   return dead;
 }