diff --git a/include/mbedtls/pkcs5.h b/include/mbedtls/pkcs5.h
index f820d22..9bbdde6 100644
--- a/include/mbedtls/pkcs5.h
+++ b/include/mbedtls/pkcs5.h
@@ -30,13 +30,7 @@
 #include "md.h"
 
 #include <stddef.h>
-
-#if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
-#include <basetsd.h>
-typedef UINT32 uint32_t;
-#else
-#include <inttypes.h>
-#endif
+#include <stdint.h>
 
 #define MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA                  -0x2f80  /**< Bad input parameters to function. */
 #define MBEDTLS_ERR_PKCS5_INVALID_FORMAT                  -0x2f00  /**< Unexpected ASN.1 data. */