diff --git a/library/ssl_cookie.c b/library/ssl_cookie.c
index 323784c..151f0c5 100644
--- a/library/ssl_cookie.c
+++ b/library/ssl_cookie.c
@@ -23,11 +23,7 @@
  * to store and retrieve the session information.
  */
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "common.h"
 
 #if defined(MBEDTLS_SSL_COOKIE_C)