diff --git a/examples/04_https_request/main/https_request_main.c b/examples/04_https_request/main/https_request_main.c
index 1d6115d08c..caf3f374a3 100644
--- a/examples/04_https_request/main/https_request_main.c
+++ b/examples/04_https_request/main/https_request_main.c
@@ -38,6 +38,7 @@
 #include "lwip/netdb.h"
 #include "lwip/dns.h"
 
+#include "mbedtls/platform.h"
 #include "mbedtls/net.h"
 #include "mbedtls/debug.h"
 #include "mbedtls/ssl.h"