diff --git a/library/md4.c b/library/md4.c
index 6a658e3..beb42c9 100644
--- a/library/md4.c
+++ b/library/md4.c
@@ -25,11 +25,7 @@
  *  http://www.ietf.org/rfc/rfc1320.txt
  */
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "common.h"
 
 #if defined(MBEDTLS_MD4_C)