diff --git a/library/gcm.c b/library/gcm.c
index e34f1da..eae9eed 100644
--- a/library/gcm.c
+++ b/library/gcm.c
@@ -29,11 +29,7 @@
  * [MGV] 4.1, pp. 12-13, to enhance speed without using too much memory.
  */
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "common.h"
 
 #if defined(MBEDTLS_GCM_C)