diff --git a/common/mbedtls/bignum.c b/common/mbedtls/bignum.c
index 7c0daebd3..9b7bcdd1c 100644
--- a/common/mbedtls/bignum.c
+++ b/common/mbedtls/bignum.c
@@ -33,6 +33,8 @@
  *
  */
 
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 #include "common.h"
 
 #if defined(MBEDTLS_BIGNUM_C)