diff --git a/scripts/config.pl b/scripts/config.pl
index 0aa5deffd..7afc89875 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -90,6 +90,7 @@ MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
 MBEDTLS_ECP_DP_M221_ENABLED
 MBEDTLS_ECP_DP_M383_ENABLED
 MBEDTLS_ECP_DP_M511_ENABLED
+MBEDTLS_MEMORY_DEBUG
 MBEDTLS_MEMORY_BACKTRACE
 MBEDTLS_MEMORY_BUFFER_ALLOC_C
 MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES