diff --git a/include/drivers/auth/mbedtls/mbedtls_config.h b/include/drivers/auth/mbedtls/mbedtls_config.h
index 8ad6d7a..51afa91 100644
--- a/include/drivers/auth/mbedtls/mbedtls_config.h
+++ b/include/drivers/auth/mbedtls/mbedtls_config.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2015-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -141,4 +141,13 @@
 #endif
 #endif
 
+/*
+ * Warn if errors from certain functions are ignored.
+ *
+ * The warnings are always enabled (where supported) for critical functions
+ * where ignoring the return value is almost always a bug. This macro extends
+ * the warnings to more functions.
+ */
+#define MBEDTLS_CHECK_RETURN_WARNING
+
 #endif /* MBEDTLS_CONFIG_H */