diff --git a/library/rsa.c b/library/rsa.c
index 6c45746..83ed3c9 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -37,11 +37,7 @@
  *
  */
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "common.h"
 
 #if defined(MBEDTLS_RSA_C)