diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 68153efdc..91162bd3d 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -182,7 +182,7 @@
  *
  * Uncomment to get errors on using deprecated functions.
  */
-//#define MBEDTLS_DEPRECATED_REMOVED
+#define MBEDTLS_DEPRECATED_REMOVED
 
 /* \} name SECTION: System support */