diff --git a/library/sha3.c b/library/sha3.c
index c8fa06c657..dbaf8b613e 100644
--- a/library/sha3.c
+++ b/library/sha3.c
@@ -33,15 +33,7 @@
 #include <string.h>
 
 #if defined(MBEDTLS_SELF_TEST)
-#if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#include <stdlib.h>
-#define mbedtls_printf printf
-#define mbedtls_calloc    calloc
-#define mbedtls_free       free
-#endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
 /*