diff --git a/LEGO1/mxunknown100dbdbc.cpp b/LEGO1/mxunknown100dbdbc.cpp
new file mode 100644
index 00000000..a420454a
--- /dev/null
+++ b/LEGO1/mxunknown100dbdbc.cpp
@@ -0,0 +1,11 @@
+#include "mxunknown100dbdbc.h"
+
+#include "decomp.h"
+
+DECOMP_SIZE_ASSERT(MxUnknown100dbdbc, 0x14)
+
+// STUB: LEGO1 0x100a6fd0
+MxUnknown100dbdbc::MxUnknown100dbdbc()
+{
+	// TODO
+}
diff --git a/LEGO1/mxunknown100dbdbc.h b/LEGO1/mxunknown100dbdbc.h
new file mode 100644
index 00000000..157058a7
--- /dev/null
+++ b/LEGO1/mxunknown100dbdbc.h
@@ -0,0 +1,17 @@
+#ifndef MXUNKNOWN100DBDBC_H
+#define MXUNKNOWN100DBDBC_H
+
+#include "decomp.h"
+#include "mxtypes.h"
+
+// VTABLE: LEGO1 0x100dbdbc
+// SIZE 0x14
+class MxUnknown100dbdbc {
+public:
+	MxUnknown100dbdbc();
+
+private:
+	undefined m_unk0x4[0x14]; // TODO: change to 0x10 once scalar deconstructor is added
+};
+
+#endif // MXUNKNOWN100DBDBC_H