diff --git a/reactos/include/psdk/winsmcrd.h b/reactos/include/psdk/winsmcrd.h
index 9c8e11891b2..dada5b652f8 100644
--- a/reactos/include/psdk/winsmcrd.h
+++ b/reactos/include/psdk/winsmcrd.h
@@ -60,7 +60,11 @@ typedef struct _SCARD_T1_REQUEST
   SCARD_IO_REQUEST ioRequest;
 } SCARD_T1_REQUEST, *PSCARD_T1_REQUEST, *LPSCARD_T1_REQUEST;
 
+#ifndef FILE_DEVICE_SMARTCARD
 #define FILE_DEVICE_SMARTCARD 49
+#elif FILE_DEVICE_SMARTCARD != 49
+#error "Incorrect Smart Card Device Definition"
+#endif
 
 #define SCARD_ATR_LENGTH (0x21)