diff --git a/library/debug.c b/library/debug.c
index 9c8c2f6..a55324e 100644
--- a/library/debug.c
+++ b/library/debug.c
@@ -42,6 +42,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
+#include "mbedtls/platform_util.h"
 
 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
     !defined(inline) && !defined(__cplusplus)
diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index 413be4a..1fe4e81 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -31,6 +31,7 @@
 #endif
 
 #include <string.h>
+#include "mbedtls/platform_util.h"
 
 #if defined(MBEDTLS_ENTROPY_C)
 
diff --git a/library/error.c b/library/error.c
index 5a813f1..c993524 100644
--- a/library/error.c
+++ b/library/error.c
@@ -28,6 +28,7 @@
 #if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
 #include "mbedtls/error.h"
 #include <string.h>
+#include "mbedtls/platform_util.h"
 #endif
 
 #if defined(MBEDTLS_PLATFORM_C)
diff --git a/library/net_sockets.c b/library/net_sockets.c
index 58244e5..76b0ecd 100644
--- a/library/net_sockets.c
+++ b/library/net_sockets.c
@@ -47,6 +47,7 @@
 #include "mbedtls/net_sockets.h"
 
 #include <string.h>
+#include "mbedtls/platform_util.h"
 
 #if (defined(_WIN32) || defined(_WIN32_WCE)) && !defined(EFIX64) && \
     !defined(EFI32)
diff --git a/library/pkcs11.c b/library/pkcs11.c
index ecdfde9..7bbc555 100644
--- a/library/pkcs11.c
+++ b/library/pkcs11.c
@@ -40,6 +40,7 @@
 #endif
 
 #include <string.h>
+#include "mbedtls/platform_util.h"
 
 void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx )
 {
diff --git a/library/pkcs5.c b/library/pkcs5.c
index e551547..7580da7 100644
--- a/library/pkcs5.c
+++ b/library/pkcs5.c
@@ -46,6 +46,7 @@
 #endif /* MBEDTLS_ASN1_PARSE_C */
 
 #include <string.h>
+#include "mbedtls/platform_util.h"
 
 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
diff --git a/library/ssl_cache.c b/library/ssl_cache.c
index fefc6d0..36c4398 100644
--- a/library/ssl_cache.c
+++ b/library/ssl_cache.c
@@ -43,6 +43,7 @@
 #include "mbedtls/ssl_internal.h"
 
 #include <string.h>
+#include "mbedtls/platform_util.h"
 
 void mbedtls_ssl_cache_init( mbedtls_ssl_cache_context *cache )
 {