diff --git a/library/ecdh.c b/library/ecdh.c
index 3cf5333..987a6ce 100644
--- a/library/ecdh.c
+++ b/library/ecdh.c
@@ -26,11 +26,7 @@
  * RFC 4492
  */
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "common.h"
 
 #if defined(MBEDTLS_ECDH_C)