diff --git a/include/detail/aglGPUMemBlockMgr.h b/include/detail/aglGPUMemBlockMgr.h
index 071fc65..3553ad1 100644
--- a/include/detail/aglGPUMemBlockMgr.h
+++ b/include/detail/aglGPUMemBlockMgr.h
@@ -64,7 +64,11 @@ class GPUMemBlockMgrHeapEx : public sead::hostio::Node, public sead::IDisposer {
     void* m10;
     sead::CriticalSection mCS;
 };
+#if not SEAD_HOSTIO_NONVIRTUAL
 static_assert(sizeof(GPUMemBlockMgrHeapEx) == 0x80);
+#else
+static_assert(sizeof(GPUMemBlockMgrHeapEx) == 0x78);
+#endif
 
 enum class GPUMemBlockMgrFlags : u8 {
     MemoryPoolRelated = 1 << 0,