diff --git a/lib/dolphin/gx/GXManage.cpp b/lib/dolphin/gx/GXManage.cpp
index c176277..fe3fd19 100644
--- a/lib/dolphin/gx/GXManage.cpp
+++ b/lib/dolphin/gx/GXManage.cpp
@@ -10,9 +10,9 @@ GXFifoObj* GXInit(void* base, u32 size) { return NULL; }
 // TODO GXReadDrawSync
 // TODO GXSetDrawSyncCallback
 
-void GXDrawDone() { DrawDoneCB(); }
+void GXDrawDone() { if (DrawDoneCB != nullptr) DrawDoneCB(); }
 
-void GXSetDrawDone() { DrawDoneCB(); }
+void GXSetDrawDone() { if (DrawDoneCB != nullptr) DrawDoneCB(); }
 
 // TODO GXWaitDrawDone