diff --git a/crypto/engine/vendor_defns/aep.h b/crypto/engine/vendor_defns/aep.h
index 55dacccff..09bcc87fe 100644
--- a/crypto/engine/vendor_defns/aep.h
+++ b/crypto/engine/vendor_defns/aep.h
@@ -9,7 +9,14 @@
  *
  */
 
+#ifdef WIN32
+typedef unsigned __int8 uint8_t;
+typedef unsigned __int16 uint16_t;
+typedef unsigned __int32 uint32_t;
+typedef unsigned __int64 uint64_t;
+#else
 #include <inttypes.h>
+#endif
 
 /*Successful return value*/
 #define AEP_R_OK                                0x00000000