diff --git a/scripts/config.pl b/scripts/config.pl
index 0d10e49..b4b0058 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -93,6 +93,7 @@
 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