diff --git a/src/recomp/rt64_layer.cpp b/src/recomp/rt64_layer.cpp
index e5a5583..6740c6d 100644
--- a/src/recomp/rt64_layer.cpp
+++ b/src/recomp/rt64_layer.cpp
@@ -45,7 +45,7 @@ void dummy_check_interrupts() {
 
 }
 
-void RT64Init(uint8_t* rom, uint8_t* rdram, ultramodern::WindowHandle window_handle) {
+bool RT64Init(uint8_t* rom, uint8_t* rdram, ultramodern::WindowHandle window_handle) {
     set_rt64_hooks();
     // Dynamic loading
     //auto RT64 = LoadLibrary("RT64.dll");
@@ -100,11 +100,11 @@ void RT64Init(uint8_t* rom, uint8_t* rdram, ultramodern::WindowHandle window_han
     gfx_info.RDRAM_SIZE = &RDRAM_SIZE;
 
 #if defined(_WIN32)
-    InitiateGFXWindows(gfx_info, window_handle.window, window_handle.thread_id);
+    return InitiateGFXWindows(gfx_info, window_handle.window, window_handle.thread_id);
 #elif defined(__ANDROID__)
     static_assert(false && "Unimplemented");
 #elif defined(__linux__)
-	InitiateGFXLinux(gfx_info, window_handle.window, window_handle.display);
+	return InitiateGFXLinux(gfx_info, window_handle.window, window_handle.display);
 #else
     static_assert(false && "Unimplemented");
 #endif
diff --git a/ultramodern/events.cpp b/ultramodern/events.cpp
index 4669912..0fe6342 100644
--- a/ultramodern/events.cpp
+++ b/ultramodern/events.cpp
@@ -174,7 +174,7 @@ void dp_complete() {
     osSendMesg(PASS_RDRAM events_context.dp.mq, events_context.dp.msg, OS_MESG_NOBLOCK);
 }
 
-void RT64Init(uint8_t* rom, uint8_t* rdram, ultramodern::WindowHandle window_handle);
+bool RT64Init(uint8_t* rom, uint8_t* rdram, ultramodern::WindowHandle window_handle);
 void RT64SendDL(uint8_t* rdram, const OSTask* task);
 void RT64UpdateScreen(uint32_t vi_origin);
 void RT64ChangeWindow();
@@ -263,7 +263,9 @@ void gfx_thread_func(uint8_t* rdram, uint8_t* rom, std::atomic_flag* thread_read
     ultramodern::set_native_thread_name("Gfx Thread");
     ultramodern::set_native_thread_priority(ultramodern::ThreadPriority::Normal);
 
-    RT64Init(rom, rdram, window_handle);
+    if (!RT64Init(rom, rdram, window_handle)) {
+        throw std::runtime_error("Failed to initialize RT64!");
+    }
     
     rsp_constants_init();