diff --git a/include/mbedtls/sha1.h b/include/mbedtls/sha1.h
index 448c272..efaf907 100644
--- a/include/mbedtls/sha1.h
+++ b/include/mbedtls/sha1.h
@@ -31,13 +31,7 @@
 #endif
 
 #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_SHA1_FILE_IO_ERROR                -0x0076  /**< Read/write error in file. */