diff --git a/docs/proposed/config-split.md b/docs/proposed/config-split.md
index 1ed3cc773f..1baab356b2 100644
--- a/docs/proposed/config-split.md
+++ b/docs/proposed/config-split.md
@@ -247,6 +247,7 @@ PSA_WANT_\* macros as in current `crypto_config.h`.
 //#define MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
 //#define MBEDTLS_PSA_CRYPTO_SPM
 #define MBEDTLS_PSA_CRYPTO_STORAGE_C
+//#define MBEDTLS_PSA_INJECT_ENTROPY
 #define MBEDTLS_PSA_ITS_FILE_C
 #define MBEDTLS_PSA_KEY_STORE_DYNAMIC
 //#define MBEDTLS_PSA_STATIC_KEY_SLOTS