diff --git a/stepmania/src/arch/MemoryCard/MemoryCardDriver.h b/stepmania/src/arch/MemoryCard/MemoryCardDriver.h
index 5ad519c367..3ddc339a03 100644
--- a/stepmania/src/arch/MemoryCard/MemoryCardDriver.h
+++ b/stepmania/src/arch/MemoryCard/MemoryCardDriver.h
@@ -48,6 +48,9 @@ struct UsbStorageDevice
 
 		/* The device is ready and usable.  sName is filled in, if available. */
 		STATE_READY,
+
+		NUM_State,
+		State_INVALID
 	};
 	State m_State;
 	RString m_sError;